Canon R5 Memory Card Speed & Buffer Tests - 47 Cards Tested

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Welcome to our Canon R5 Memory Card Guide with actual in-camera speed and buffer tests of 47 CFexpress Type B and UHS-II SDXC cards.

By analyzing how long each card takes to clear the R5's buffer we can more confidently guide you on which cards are best suited to your needs and budget.

When shooting RAW (46.1MB) + JPEG L (16.1MB) at 20 fps the Canon R5 will write to the fastest CFexpress Type-B cards at up to approximately 520MB/s.

Therefore, because many of the cards tested here can comfortably handle these speeds you won't see a noticeable difference in buffer clearing times between premium cards such as the Lexar Diamond or Delkin Black and midrange cards like the Lexar Gold or Delkin Power.

However, some premium cards such as the Delkin Black Series offer better warranties, tougher build quality and increased reliability which are also important purchasing factors.

In fact, Delkin are the only company to offer a 48-hour replacement guarantee for their Black Series along with US and European support teams.

R5 Supported Memory Cards

The Canon EOS R5 features two memory cards slots. Slot 1 supports CFexpress Type B Memory Cards whilst Slot 2 supports SD/SDHC/SDXC UHS-I and UHS-II memory cards.

The theoretical maximum speed of each card type is:

CFexpress Type-B: Up to 2 GB/s (CFe 2.0) & up to 4 GB/s (CFe 4.0)
UHS-II: Up to 312 MB/s
UHS-I: Up to 104 MB/s

However, you are unlikely to see these maximum speeds in-camera even with the fastest cards due to camera limitations.

The R5 supports the CFexpress 2.0 standard but not the latest 4.0 standard. However you can still use CFexpress 4.0 cards because they are backwards compatible, you just won't see any advantages in-camera. Where you will see an advantage is when copying files from your memory card to your computer, with a 4.0 card this can be up to twice as fast compared to a 2.0 card providing you are using a CFexpress 4.0 compatible reader.

R5 In-Camera Card Speed & Buffer Results Summary

Here’s a quick performance summary for all of the cards that we have tested in the R5 so far.

CFexpress Type B Memory Cards

CFexpress Type-B Card	In-Camera Write Speed *	Max Burst *	Time to Clear Buffer Seconds *
1. Delkin Devices BLACK 4.0 325GB	520 MB/s	64	4.15
2. Delkin Devices POWER 4.0 512GB	520 MB/s	64	4.15
3. Lexar Professional DIAMOND Series 128GB	520 MB/s	64	4.15
4. SanDisk PRO-CINEMA 256GB	520 MB/s	64	4.15
5. Nextorage NX-B1 PRO Series 330GB	520 MB/s	64	4.15
6. Delkin Devices POWER G4 160GB	519 MB/s	64	4.17
7. Angelbird AV Pro SE 512GB	519 MB/s	64	4.17
8. Lexar Professional GOLD Series 128GB	519 MB/s	64	4.17
9. Lexar Professional SILVER Series 128GB	519 MB/s	64	4.17
10. ProGrade Digital 4.0 Gold 512GB	519 MB/s	64	4.17
11. Nextorage NX-B2 SE Series 512GB	518 MB/s	64	4.19
12. ProGrade Digital Cobalt 325GB	518 MB/s	64	4.19
13. Angelbird AV PRO SX 160GB	518 MB/s	64	4.19
14. SanDisk Extreme PRO 512GB	518 MB/s	64	4.19
15. OWC Atlas Pro 4.0 256GB	517 MB/s	64	4.21
16. OWC Atlas Ultra 325GB	517 MB/s	64	4.21
17. PERGEAR CFE-B Prime 512GB	515 MB/s	64	4.25
18. Exascend Essential Series 512GB	515 MB/s	64	4.25
19. OWC Atlas Pro 512GB	441 MB/s	64	5.45
20. SanDisk Extreme PRO 128GB	419 MB/s	64	5.86
21. Sony TOUGH 240GB	348 MB/s	64	7.14
22. Integral UltimaPro X2 128GB	282 MB/s	64	11.05
23. ProGrade Digital Gold 128GB	225 MB/s	64	13.53
24. Wise Advanced CFX-B Series 128GB	193 MB/s	63	16.71

* Approximate speed when shooting in RAW + JPEG L at 20 FPS

UHS-II SDXC Memory Cards

UHS-II SD Card	In-Camera Write Speed *	Max Burst *	Time to Clear Buffer Seconds *
1. Nextorage NX-F2PRO Series 256GB	255 MB/s	64	12.38
2. Sony SF-G Tough 64GB	243 MB/s	64	12.88
3. Delkin Devices BLACK 64GB	238 MB/s	64	13.18
4. Kingston Canvas React Plus 64GB	238 MB/s	64	13.26
5. PNY X-PRO 90 64GB	226 MB/s	64	13.61
6. Ritzgear Video Pro 64GB	226 MB/s	64	14.01
7. Hoodman Steel 2000x 64GB	226 MB/s	64	14.05
8. Transcend SD 700S 64GB	222 MB/s	64	14.08
9. Lexar Professional 2000X 64GB	222 MB/s	64	14.09
10. OWC Atlas Ultra 128GB	224 MB/s	64	14.23
11. Delkin Devices POWER 64GB	215 MB/s	64	14.86
12. SanDisk Extreme Pro 64GB	215 MB/s	64	14.86
13. Integral UltimaPro X2 64GB	215 MB/s	64	14.91
14. ProGrade V90 64GB	213 MB/s	64	15.30
15. Exascend Catalyst 64GB	213 MB/s	64	15.30
16. Nextorage NX-F2SE Series 512GB	172 MB/s	64	19.63
17. Sony SF-M Tough 64GB	140 MB/s	64	24.50
18. Sony SF-M 64GB	140 MB/s	64	24.50
19. ProGrade V60 64GB	124 MB/s	64	27.01
20. Angelbird AV Pro MK2 V60 64GB	101 MB/s	64	35.23
21. Lexar Professional 1667X 64GB	99 MB/s	64	36.03
22. Angelbird AV Pro Mk 2 V90 64GB	87 MB/s	64	41.06
23. Sony SF-E 64GB	74 MB/s	64	49.72

* Approximate speed when shooting in RAW + JPEG L at 20 FPS

Canon R5 CFexpress Type B Speed & Buffer Tests

For shooting sports, birds in flight or any other fast action which requires continuous bursts CFexpress Type B memory cards will clear the buffer much faster than SD/SDHC/SDXC UHS-II / UHS-I cards.

For all of our tests we use the Electronic Shutter in Hi+ (20 FPS) and manual focus with ISO set to 100 and a minimum shutter speed of 1/250th which is sufficient to achieve 20 FPS with the R5. For HEIF files the FPS is limited to 12 FPS. High ISO noise reduction is set to standard and we always shoot the same scene for consistency with the file sizes.

Please note that the maximum number of shots before the buffer is full can decrease as ISO rises due to the added noise making the file sizes larger.

Also please note that sometimes the same card will have different read and write speeds depending on the capacity of the card, therefore these results are only valid for the sizes that we have tested here.

1. Delkin Devices BLACK 4.0 CFexpress Type B (325GB)

Delkin Devices 325GB BLACK 4.0 CFexpress Type B Memory Card

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Bus Type: PCIe 4.0
Capacities: 256GB, 325GB, 650GB, 1.3TB
Maximum Read Speed: 3530 MB/s (325GB)
Maximum Write speed: 3250 MB/s (325GB)
Sustained Write Speed: 2060 MB/s (325GB)
Video Performance Guarantee: Not certified

During our tests with a 325GB card the R5 in-camera write speed was approximately 528 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.67
CRAW (20.7MB)	181	9.95
JPEG L (16.1MB)	194	10.34
HEIF L (18.9MB) 12 FPS	403	10.23
RAW (46.1MB) + JPEG L (16.1MB)	63	3.93
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.93
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.73
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.21

2. Delkin Devices POWER 4.0 CFexpress Type B (512GB)

Delkin Devices 512GB POWER 4.0 CFexpress Type B Memory Card

Bus Type: PCIe 4.0
Capacities: 512GB, 1TB, 2TB
Maximum Read Speed: 3650 MB/s (512GB)
Maximum Write speed: 3240 MB/s (512GB)
Sustained Write Speed: 820 MB/s (512GB)
Video Performance Guarantee: Not certified

During our tests with a 512GB card the R5 in-camera write speed was approximately 528 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.67
CRAW (20.7MB)	181	9.96
JPEG L (16.1MB)	194	10.34
HEIF L (18.9MB) 12 FPS	403	10.24
RAW (46.1MB) + JPEG L (16.1MB)	63	3.93
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.94
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.75
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.32

3. Lexar Professional DIAMOND Series CFexpress Type B (128GB)

Bus Type: PCIe 3.0
Capacities: 128GB, 256GB
Maximum Read Speed: 1900 MB/s
Maximum Write speed: 1700 MB/s
Sustained Write Speed: N/A
Video Performance Guarantee: Not certified

During our tests with this card the R5 in-camera write speed was approximately 528 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.68
CRAW (20.7MB)	165	9.12
JPEG L (16.1MB)	193	10.34
HEIF L (18.9MB) 12 FPS	437	11.00
RAW (46.1MB) + JPEG L (16.1MB)	63	3.93
CRAW (20.7MB) + JPEG L (16.1MB)	165	10.03
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.58
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	25.50

4. SanDisk PRO-CINEMA CFexpress Type B (256GB)

SanDisk 256GB PRO-CINEMA CFexpress Type B Memory Card

Bus Type: PCIe 3.0
Capacities: 256GB, 320GB, 640GB
Maximum Read Speed: 1700 MB/s (256GB)
Maximum Write speed: 1500 MB/s (256GB)
Sustained Write Speed: 400 MB/s (256GB)
Video Performance Guarantee: VPG-400

During our tests with a 256GB card the R5 in-camera write speed was approximately 528 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.69
CRAW (20.7MB)	181	9.91
JPEG L (16.1MB)	192	10.45
HEIF L (18.9MB) 12 FPS	403	10.29
RAW (46.1MB) + JPEG L (16.1MB)	63	3.93
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.96
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.79
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.36

5. Nextorage NX-B1 PRO Series CFexpress Type B(330GB)

Nextorage 330GB NX-B1PRO Series CFexpress Type B Memory Card

Bus Type: PCIe 3.0
Capacities: 165GB, 330GB, 660GB, 1330GB
Maximum Read Speed: 1950 MB/s (330GB)
Maximum Write speed: 1900 MB/s (330GB)
Sustained Write Speed: 1800 MB/s (330GB)
Video Performance Guarantee: VPG-400

During our tests with a 330GB card the R5 in-camera write speed was approximately 528 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.61
CRAW (20.7MB)	181	9.95
JPEG L (16.1MB)	186	10.36
HEIF L (18.9MB) 12 FPS	403	10.23
RAW (46.1MB) + JPEG L (16.1MB)	63	3.93
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.94
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.74
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.25

6. Delkin Devices POWER G4 CFexpress Type B (160GB)

Delkin Devices 160GB POWER G4 CFexpress Type B Memory Card

Bus Type: PCIe 3.0
Capacities: 512GB, 1TB, 2TB
Maximum Read Speed: 1780 MB/s (160GB)
Maximum Write speed: 1700 MB/s (160GB)
Sustained Write Speed: 805 MB/s (160GB)
Video Performance Guarantee: Not certified

During our tests with a 160GB card the R5 in-camera write speed was approximately 527 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.69
CRAW (20.7MB)	181	9.95
JPEG L (16.1MB)	189	10.66
HEIF L (18.9MB) 12 FPS	403	10.25
RAW (46.1MB) + JPEG L (16.1MB)	63	3.95
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.94
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.76
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.32

7. Angelbird AV Pro SE CFexpress Type B (512GB)

Bus Type: PCIe 3.0
Capacities: 512GB
Maximum Read Speed: 1785 MB/s
Maximum Write Speed: 850 MB/s
Sustained Write Speed: N/A
Video Performance Guarantee: Not certified

During our tests with this card the R5 in-camera write speed was approximately 527 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.69
CRAW (20.7MB)	181	9.91
JPEG L (16.1MB)	192	11.03
HEIF L (18.9MB) 12 FPS	403	10.29
RAW (46.1MB) + JPEG L (16.1MB)	63	3.95
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.97
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.80
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.37

8. Lexar Professional CFexpress Type B GOLD Series (128GB)

Lexar 128GB Professional CFexpress Type B Card GOLD Series

Bus Type: PCIe 3.0
Capacities: 128GB, 256GB, 512GB, 1TB, 2TB
Maximum Read Speed: 1750 MB/s (128GB)
Maximum Write speed: 1500 MB/s (128GB)
Sustained Write Speed: 1000 MB/s (128GB)
Video Performance Guarantee: Not certified

During our tests with a 128GB card the R5 in-camera write speed was approximately 527 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.65
CRAW (20.7MB)	181	9.94
JPEG L (16.1MB)	197	11.11
HEIF L (18.9MB) 12 FPS	403	10.24
RAW (46.1MB) + JPEG L (16.1MB)	63	3.95
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.93
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.74
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.22

9. Lexar Professional CFexpress Type B SILVER Series (128GB)

Lexar 128GB Professional CFexpress Type B Card SILVER Series

Bus Type: PCIe 3.0
Capacities: 128GB, 256GB, 512GB, 1TB
Maximum Read Speed: 1750 MB/s (128GB)
Maximum Write speed: 1300 MB/s (128GB)
Sustained Write Speed: 480 MB/s (128GB)
Video Performance Guarantee: Not certified

During our tests with a 128GB card the R5 in-camera write speed was approximately 527 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.66
CRAW (20.7MB)	181	9.94
JPEG L (16.1MB)	197	11.12
HEIF L (18.9MB) 12 FPS	403	10.24
RAW (46.1MB) + JPEG L (16.1MB)	63	3.95
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.93
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.75
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.25

10. ProGrade Digital CFexpress 4.0 Type B Gold (512GB)

ProGrade Digital 512GB CFexpress 4.0 Type B Gold Memory Card

Bus Type: PCIe 4.0
Capacities: 256GB, 512GB, 1TB, 2TB
Maximum Read Speed: 3400 MB/s (512GB)
Maximum Write speed: 3000 MB/s (512GB)
Sustained Write Speed: 850 MB/s (512GB)
Video Performance Guarantee: Not certified

During our tests with a 512GB card the R5 in-camera write speed was approximately 527 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.70
CRAW (20.7MB)	181	9.92
JPEG L (16.1MB)	192	11.03
HEIF L (18.9MB) 12 FPS	403	10.29
RAW (46.1MB) + JPEG L (16.1MB)	63	3.95
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.96
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.78
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.37

11. Nextorage NX-B2 SE Series CFexpress Type B (512GB)

Nextorage 512GB NX-B2SE Series CFexpress 2.0 Type B Memory Card

Bus Type: PCIe 3.0
Capacities: 128GB, 256GB, 512GB
Maximum Read Speed: 1950 MB/s (512GB)
Maximum Write speed: 1900 MB/s (512GB)
Sustained Write Speed: 800 MB/s (512GB)
Video Performance Guarantee: Not certified

During our tests with a 512GB card the R5 in-camera write speed was approximately 526 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.57
CRAW (20.7MB)	181	9.96
JPEG L (16.1MB)	186	10.36
HEIF L (18.9MB) 12 FPS	403	10.25
RAW (46.1MB) + JPEG L (16.1MB)	63	3.97
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.94
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.77
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.25

12. ProGrade Digital Cobalt CFexpress Type B (325GB)

Bus Type: PCIe 3.0
Capacities: 325GB, 650GB
Maximum Read Speed: 1700 MB/s (325GB)
Maximum Write speed: 1500 MB/s (325GB)
Sustained Write Speed: N/A
Video Performance Guarantee: Not certified

During our tests with this card the R5 in-camera write speed was approximately 526 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	86	5.57
CRAW (20.7MB)	168	9.15
JPEG L (16.1MB)	185	1.69
HEIF L (18.9MB) 12 FPS	432	10.15
RAW (46.1MB) + JPEG L (16.1MB)	63	3.97
CRAW (20.7MB) + JPEG L (16.1MB)	160	9.72
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	84	14.36
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	156	25.01

13. Angelbird AV PRO SX CFexpress Type B (160GB)

Bus Type: PCIe 3.0
Capacities: 160GB
Maximum Read Speed: 1785 MB/s
Maximum Write speed: 1600 MB/s
Sustained Write Speed: N/A
Video Performance Guarantee: Not certified

During our tests with this card the R5 in-camera write speed was approximately 526 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	86	5.56
CRAW (20.7MB)	168	9.15
JPEG L (16.1MB)	185	10.61
HEIF L (18.9MB) 12 FPS	433	10.18
RAW (46.1MB) + JPEG L (16.1MB)	63	3.97
CRAW (20.7MB) + JPEG L (16.1MB)	160	9.72
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	84	14.36
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	157	25.11

14. SanDisk Extreme PRO CFexpress Type B (512GB)

SanDisk 512GB Extreme PRO CFexpress Card Type B Memory Card

Bus Type: PCIe 3.0
Capacities: 64GB, 128GB, 256GB, 512GB
Maximum Read Speed: 1700 MB/s (512GB)
Maximum Write speed: 1500 MB/s (512GB)
Sustained Write Speed: N/A
Video Performance Guarantee: Not certified

During our tests with a 512GB card the R5 in-camera write speed was approximately 526 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.70
CRAW (20.7MB)	181	9.92
JPEG L (16.1MB)	192	11.03
HEIF L (18.9MB) 12 FPS	403	10.29
RAW (46.1MB) + JPEG L (16.1MB)	63	3.97
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.96
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.78
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.37

15. OWC Atlas Pro 4.0 CFexpress Type B (256GB)

OWC 256GB Atlas Pro CFexpress 4.0 Type B Memory Card

Bus Type: PCIe 4.0
Capacities: 256GB, 512GB
Maximum Read Speed: 3650 MB/s (256GB)
Maximum Write speed: 3000 MB/s (256GB)
Sustained Write Speed: 800 MB/s (256GB)
Video Performance Guarantee: Not certified

During our tests with a 256GB card the R5 in-camera write speed was approximately 525 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.58
CRAW (20.7MB)	181	9.97
JPEG L (16.1MB)	186	10.36
HEIF L (18.9MB) 12 FPS	403	10.25
RAW (46.1MB) + JPEG L (16.1MB)	63	3.99
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.94
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.79
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.29

16. OWC Atlas Ultra CFexpress Type B (325GB)

OWC 325GB Atlas Ultra CFexpress Type B Memory Card

Bus Type: PCIe 3.0
Capacities: 325GB, 650GB, 2TB
Maximum Read Speed: 1700 MB/s (325GB)
Maximum Write speed: 1500 MB/s (325GB)
Sustained Write Speed: 1300 MB/s (325GB)
Video Performance Guarantee: Not certified

During our tests with a 325GB card the R5 in-camera write speed was approximately 525 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.59
CRAW (20.7MB)	181	9.97
JPEG L (16.1MB)	186	10.38
HEIF L (18.9MB) 12 FPS	403	10.27
RAW (46.1MB) + JPEG L (16.1MB)	63	3.99
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.95
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.84
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.34

17. PERGEAR CFE-B Prime CFexpress Type-B (512GB)

PERGEAR 512GB CFE-B Prime CFexpress Type-B Memory Card

Bus Type: PCIe 3.0
Capacities: 512GB, 1TB, 4TB
Maximum Read Speed: 1780 MB/s (512GB)
Maximum Write speed: 1000 MB/s (512GB)
Sustained Write Speed: 1000 MB/s (512GB)
Video Performance Guarantee: Not certified

During our tests with a 512GB card the R5 in-camera write speed was approximately 523 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.60
CRAW (20.7MB)	181	9.97
JPEG L (16.1MB)	186	10.38
HEIF L (18.9MB) 12 FPS	403	10.26
RAW (46.1MB) + JPEG L (16.1MB)	63	4.03
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.97
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.80
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.34

18. Exascend Essential Series CFexpress Type B (512GB)

Bus Type: PCIe 3.0
Capacities: 128GB, 256GB, 512GB, 1TB, 2TB
Maximum Read Speed: 1800 MB/s (512GB)
Maximum Write Speed: 1700 MB/s (512GB)
Sustained Write Speed: N/A
Video Performance Guarantee: Not certified

During our tests with this card the R5 in-camera write speed was approximately 515 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.88
CRAW (20.7MB)	169	9.71
JPEG L (16.1MB)	193	12.05
HEIF L (18.9MB) 12 FPS	409	12.83
RAW (46.1MB) + JPEG L (16.1MB)	63	4.19
CRAW (20.7MB) + JPEG L (16.1MB)	149	24.56
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	15.01
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	159	25.38

19. OWC Atlas Pro CFexpress Type B (512GB)

OWC 512GB Atlas Pro CFexpress Type B Memory Card

Bus Type: PCIe 3.0
Capacities: 256GB, 512GB
Maximum Read Speed: 1700 MB/s (512GB)
Maximum Write speed: 1500 MB/s (512GB)
Sustained Write Speed: 400 MB/s (512GB)
Video Performance Guarantee: Not certified

During our tests with a 512GB card the R5 in-camera write speed was approximately 441 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	87	6.96
CRAW (20.7MB)	181	10.48
JPEG L (16.1MB)	186	10.60
HEIF L (18.9MB) 12 FPS	402	10.20
RAW (46.1MB) + JPEG L (16.1MB)	63	5.45
CRAW (20.7MB) + JPEG L (16.1MB)	164	9.95
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.78
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.30

20. SanDisk Extreme PRO CFexpress Type B (128GB)

Bus Type: PCIe 3.0
Capacities: 64GB, 128GB, 256GB, 512GB
Maximum Read Speed: 1700 MB/s (128GB)
Maximum Write Speed: 1200 MB/s (128GB)
Sustained Write Speed: N/A
Video Performance Guarantee: Not certified

During our tests with this card the R5 in-camera write speed was approximately 419 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	5.91
CRAW (20.7MB)	174	10.03
JPEG L (16.1MB)	193	10.91
HEIF L (18.9MB) 12 FPS	436	10.60
RAW (46.1MB) + JPEG L (16.1MB)	63	5.86
CRAW (20.7MB) + JPEG L (16.1MB)	164	10.10
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.60
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	25.70

21. Sony CFexpress Type B TOUGH (240GB)

Sony 240GB CFexpress Type B TOUGH Memory Card

Bus Type: PCIe 3.0
Capacities: 240GB, 256GB, 480GB, 512GB, 960GB, 1920GB
Maximum Read Speed: 1850 MB/s (240GB)
Maximum Write speed: 1600 MB/s (240GB)
Sustained Write Speed: N/A
Video Performance Guarantee: Not certified

During our tests with a 240GB card the R5 in-camera write speed was approximately 348 MB/s when shooting in RAW + JPEG L.

Note: This card struggles when shooting in RAW + JPEG L and takes around 3 seconds longer to clear the buffer than similar speed rated cards. It appears to be fine when shooting in the other image types.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	83	5.81
CRAW (20.7MB)	177	10.03
JPEG L (16.1MB)	193	11.10
HEIF L (18.9MB) 12 FPS	402	10.29
RAW (46.1MB) + JPEG L (16.1MB)	63	7.14
CRAW (20.7MB) + JPEG L (16.1MB)	161	9.98
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	14.79
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.40

22. Integral UltimaPro X2 CFexpress Type B (128GB)

Integral 128GB UltimaPro X2 CFexpress Type B Memory Card

Bus Type: PCIe 3.0
Capacities: 128GB, 256GB
Maximum Read Speed: 1700 MB/s (128GB)
Maximum Write speed: 1600 MB/s (128GB)
Sustained Write Speed: 310 MB/s (128GB)
Video Performance Guarantee: Not certified

During our tests with a 128GB card the R5 in-camera write speed was approximately 282 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	88	11.93
CRAW (20.7MB)	162	10.78
JPEG L (16.1MB)	186	10.45
HEIF L (18.9MB) 12 FPS	403	10.45
RAW (46.1MB) + JPEG L (16.1MB)	63	11.05
CRAW (20.7MB) + JPEG L (16.1MB)	164	22.68
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	24.16
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	25.15

23. ProGrade Digital Gold CFexpress Type B (128GB)

Bus Type: PCIe 3.0
Capacities: 128GB, 256GB
Maximum Read Speed: 1700 MB/s (128GB)
Maximum Write Speed: 1400 MB/s (128GB)
Sustained Write Speed: N/A
Video Performance Guarantee: Not certified

During our tests with this card the R5 in-camera write speed was approximately 225 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	64	7.03
CRAW (20.7MB)	174	12.06
JPEG L (16.1MB)	194	11.60
HEIF L (18.9MB) 12 FPS	413	12.55
RAW (46.1MB) + JPEG L (16.1MB)	63	13.53
CRAW (20.7MB) + JPEG L (16.1MB)	163	24.71
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	25.00
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	156	27.12

24. Wise Advanced CFX-B Series CFexpress Type B (128GB)

Bus Type: PCIe 3.0
Capacities: 128GB, 256GB, 512GB, 1TB
Maximum Read Speed: 1700 MB/s (128GB)
Maximum Write Speed: 1050 MB/s (128GB)
Sustained Write Speed: N/A
Video Performance Guarantee: Not certified

During our tests with this card the R5 in-camera write speed was approximately 193 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	63	9.80
CRAW (20.7MB)	174	12.86
JPEG L (16.1MB)	193	12.06
HEIF L (18.9MB) 12 FPS	409	12.83
RAW (46.1MB) + JPEG L (16.1MB)	63	16.71
CRAW (20.7MB) + JPEG L (16.1MB)	149	24.56
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	87	27.01
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	155	29.86

Canon R5 SDXC UHS-II Speed & Buffer Tests

Memory card slot 2 of the R5 supports SD/SDHC/SDXC (UHS-II and UHS-I) memory cards.

For clarity on the capacity: SD cards go up to 2GB. SDHC (High Capacity) range from 4GB to 32GB and SDXC (Extended Capacity) cards go from 64GB up to 2TB.

For clarification on the speed: UHS-I cards max out at 104 MB/s and UHS-II cards that feature a second row of pins max out at up to 312 MB/s.

Since the R5 produces some pretty large file sizes from its 45 megapixel sensor we have only tested the faster UHS-II cards. We wouldn't recommend restricting the R5 by using UHS-I cards.

These tests were carried out using the Electronic Shutter in Hi+ (20 FPS) mode.

1. Nextorage NX-F2PRO Series UHS-II SDXC (256GB)

Nextorage NX-F2PRO Series UHS-II SDXC (256GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 299 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 255 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	77	10.80
CRAW (20.7MB)	184	10.58
JPEG L (16.1MB)	196	10.95
HEIF L (18.9MB) 12 FPS	456	11.15
RAW (46.1MB) + JPEG L (16.1MB)	64	12.38
CRAW (20.7MB) + JPEG L (16.1MB)	143	14.28
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	83	17.10
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	26.40

2. Sony SF-G Tough SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 32GB (SDHC), 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 299 MB/s
Minimum Write Speed: 90 MB/s
Video speed class: V90

During our tests with this card the R5 in-camera write speed was approximately 243 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	77	11.28
CRAW (20.7MB)	168	9.73
JPEG L (16.1MB)	194	11.06
HEIF L (18.9MB) 12 FPS	456	11.30
RAW (46.1MB) + JPEG L (16.1MB)	63	12.88
CRAW (20.7MB) + JPEG L (16.1MB)	138	16.44
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	82	18.20
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	26.68

3. Delkin Devices BLACK UHS-II SDXC (64GB)

Delkin Devices 64GB BLACK UHS-II SDXC Memory Card

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB, 512GB
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 250 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 238 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	77	11.38
CRAW (20.7MB)	183	10.60
JPEG L (16.1MB)	195	11.01
HEIF L (18.9MB) 12 FPS	456	11.20
RAW (46.1MB) + JPEG L (16.1MB)	64	13.18
CRAW (20.7MB) + JPEG L (16.1MB)	138	15.48
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	82	18.10
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	26.48

4. Kingston Canvas React Plus SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 32GB (SDHC), 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 260 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 238 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	76	11.39
CRAW (20.7MB)	168	9.74
JPEG L (16.1MB)	193	11.01
HEIF L (18.9MB) 12 FPS	456	11.31
RAW (46.1MB) + JPEG L (16.1MB)	63	13.26
CRAW (20.7MB) + JPEG L (16.1MB)	138	16.43
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	82	18.20
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	26.58

5. PNY X-PRO 90 SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 280 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 226 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	76	11.30
CRAW (20.7MB)	168	9.71
JPEG L (16.1MB)	193	10.58
HEIF L (18.9MB) 12 FPS	456	11.21
RAW (46.1MB) + JPEG L (16.1MB)	63	13.61
CRAW (20.7MB) + JPEG L (16.1MB)	138	16.43
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	82	18.10
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	26.52

6. Ritzgear Video Pro SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 280 MB/s
Maximum Write Speed: 250 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 226 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	75	11.01
CRAW (20.7MB)	167	9.70
JPEG L (16.1MB)	193	11.01
HEIF L (18.9MB) 12 FPS	455	11.30
RAW (46.1MB) + JPEG L (16.1MB)	63	14.01
CRAW (20.7MB) + JPEG L (16.1MB)	138	16.33
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	82	18.21
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	26.57

7. Hoodman Steel 2000x SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB (SDXC)
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 260 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 226 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	76	11.34
CRAW (20.7MB)	168	9.84
JPEG L (16.1MB)	193	11.05
HEIF L (18.9MB) 12 FPS	455	11.31
RAW (46.1MB) + JPEG L (16.1MB)	63	14.05
CRAW (20.7MB) + JPEG L (16.1MB)	139	16.63
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	82	18.20
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	26.57

8. Transcend SD 700S SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 32GB (SDHC), 64GB (SDXC)
Maximum Read Speed: 285 MB/s
Maximum Write Speed: 180 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 222 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	76	11.11
CRAW (20.7MB)	168	9.79
JPEG L (16.1MB)	194	11.15
HEIF L (18.9MB) 12 FPS	455	11.12
RAW (46.1MB) + JPEG L (16.1MB)	63	14.08
CRAW (20.7MB) + JPEG L (16.1MB)	138	16.33
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	82	18.40
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	27.01

9. Lexar Professional 2000X SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 32GB (SDHC), 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 260 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 222 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	76	11.16
CRAW (20.7MB)	168	9.78
JPEG L (16.1MB)	194	11.16
HEIF L (18.9MB) 12 FPS	455	11.08
RAW (46.1MB) + JPEG L (16.1MB)	63	14.09
CRAW (20.7MB) + JPEG L (16.1MB)	137	16.34
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	82	18.40
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	27.00

10. OWC Atlas Ultra UHS-II SDXC (128GB)

OWC Atlas Ultra UHS-II SDXC (128GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB, 512GB
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 250 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 224 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	77	12.02
CRAW (20.7MB)	179	11.05
JPEG L (16.1MB)	195	11.08
HEIF L (18.9MB) 12 FPS	407	10.54
RAW (46.1MB) + JPEG L (16.1MB)	64	14.23
CRAW (20.7MB) + JPEG L (16.1MB)	134	15.83
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	83	17.93
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	159	26.25

11. Delkin Devices POWER SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 32GB (SDHC), 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 250 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 215 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	76	11.16
CRAW (20.7MB)	168	9.78
JPEG L (16.1MB)	194	11.16
HEIF L (18.9MB) 12 FPS	456	11.38
RAW (46.1MB) + JPEG L (16.1MB)	63	14.90
CRAW (20.7MB) + JPEG L (16.1MB)	138	16.45
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	82	18.29
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	26.78

12. SanDisk Extreme Pro SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 32GB (SDHC), 64GB, 128GB, 256GB, 512GB (SDXC)
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 260 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 215 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	76	11.17
CRAW (20.7MB)	168	9.78
JPEG L (16.1MB)	194	11.16
HEIF L (18.9MB) 12 FPS	456	11.39
RAW (46.1MB) + JPEG L (16.1MB)	63	14.86
CRAW (20.7MB) + JPEG L (16.1MB)	138	16.43
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	82	18.32
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	26.79

13. Integral UltimaPro X2 UHS-II SDXC (64GB)

Integral UltimaPro X2 UHS-II SDXC (64GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB, 512GB
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 280 MB/s
Sustained Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 215 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	77	12.17
CRAW (20.7MB)	179	11.25
JPEG L (16.1MB)	194	11.09
HEIF L (18.9MB) 12 FPS	402	10.50
RAW (46.1MB) + JPEG L (16.1MB)	64	14.91
CRAW (20.7MB) + JPEG L (16.1MB)	134	16.02
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	83	17.99
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	160	26.39

14. ProGrade V90 SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB, 512GB (SDXC)
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 250 MB/s
Sustained Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 213 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	75	12.35
CRAW (20.7MB)	174	9.86
JPEG L (16.1MB)	194	11.21
HEIF L (18.9MB) 12 FPS	454	12.12
RAW (46.1MB) + JPEG L (16.1MB)	63	15.30
CRAW (20.7MB) + JPEG L (16.1MB)	134	17.46
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	81	18.00
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	26.58

15. Exascend Catalyst SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB (SDXC)
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 280 MB/s
Sustained Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 213 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	76	12.11
CRAW (20.7MB)	174	9.87
JPEG L (16.1MB)	194	11.25
HEIF L (18.9MB) 12 FPS	454	12.11
RAW (46.1MB) + JPEG L (16.1MB)	63	15.26
CRAW (20.7MB) + JPEG L (16.1MB)	133	17.36
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	80	17.80
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	161	26.63

16. Nextorage NX-F2SE Series UHS-II SDXC (512GB)

Nextorage NX-F2SE Series UHS-II SDXC (512GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB
Maximum Read Speed: 280 MB/s
Maximum Write Speed: 170 MB/s
Minimum Write Speed: 60 MB/s
Video Rating: V60

During our tests with this card the R5 in-camera write speed was approximately 172 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	70	15.36
CRAW (20.7MB)	176	12.98
JPEG L (16.1MB)	194	11.43
HEIF L (18.9MB) 12 FPS	404	10.43
RAW (46.1MB) + JPEG L (16.1MB)	64	19.63
CRAW (20.7MB) + JPEG L (16.1MB)	128	20.86
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	73	24.05
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	144	26.66

17. Sony SF-M Tough SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 32GB (SDHC), 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 277 MB/s
Maximum Write Speed: 150 MB/s
Minimum Write Speed: 60 MB/s
Video Rating: V60

During our tests with this card the R5 in-camera write speed was approximately 140 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	64	17.89
CRAW (20.7MB)	170	17.58
JPEG L (16.1MB)	189	13.76
HEIF L (18.9MB) 12 FPS	260	10.70
RAW (46.1MB) + JPEG L (16.1MB)	63	24.50
CRAW (20.7MB) + JPEG L (16.1MB)	120	25.90
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	72	28.76
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	136	31.35

18. Sony SF-M SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 32GB (SDHC), 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 277 MB/s
Maximum Write Speed: 150 MB/s
Minimum Write Speed: 60 MB/s
Video Rating: V60

During our tests with this card the R5 in-camera write speed was approximately 140 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	64	17.90
CRAW (20.7MB)	170	17.59
JPEG L (16.1MB)	189	13.73
HEIF L (18.9MB) 12 FPS	260	10.74
RAW (46.1MB) + JPEG L (16.1MB)	63	24.50
CRAW (20.7MB) + JPEG L (16.1MB)	120	25.90
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	72	28.79
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	136	31.38

19. ProGrade V60 SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 250 MB/s
Maximum Write Speed: 150 MB/s
Minimum Write Speed: 130 MB/s
Video Rating: V60

During our tests with this card the R5 in-camera write speed was approximately 124 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	64	19.89
CRAW (20.7MB)	161	17.25
JPEG L (16.1MB)	189	14.43
HEIF L (18.9MB) 12 FPS	260	11.73
RAW (46.1MB) + JPEG L (16.1MB)	63	27.01
CRAW (20.7MB) + JPEG L (16.1MB)	118	28.01
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	72	29.39
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	135	31.56

20. Angelbird AV Pro MK2 V60 UHS-II SDXC (64GB)

Angelbird AV Pro MK2 UHS-II SDXC (64GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB, 512GB, 1TB
Maximum Read Speed: 280 MB/s
Maximum Write Speed: 160 MB/s
Minimum Write Speed: 60 MB/s
Video Rating: V60

During our tests with this card the R5 in-camera write speed was approximately 101 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	63	25.38
CRAW (20.7MB)	152	23.38
JPEG L (16.1MB)	193	20.66
HEIF L (18.9MB) 12 FPS	199	20.20
RAW (46.1MB) + JPEG L (16.1MB)	63	35.23
CRAW (20.7MB) + JPEG L (16.1MB)	113	34.91
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	64	39.58
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	121	44.06

21. Lexar Professional 1667X SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 250 MB/s
Maximum Write Speed: 120 MB/s
Minimum Write Speed: 60 MB/s
Video Rating: V60

During our tests with this card the R5 in-camera write speed was approximately 99 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	63	25.50
CRAW (20.7MB)	151	24.18
JPEG L (16.1MB)	186	21.13
HEIF L (18.9MB) 12 FPS	200	18.95
RAW (46.1MB) + JPEG L (16.1MB)	63	36.03
CRAW (20.7MB) + JPEG L (16.1MB)	113	36.07
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	65	38.88
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	121	43.97

22. Angelbird AV Pro Mk 2 V90 SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 32GB (SDHC), 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 300 MB/s
Maximum Write Speed: 280 MB/s
Minimum Write Speed: 90 MB/s
Video Rating: V90

During our tests with this card the R5 in-camera write speed was approximately 86.6 MB/s when shooting in RAW + JPEG L.

This card performs very poorly in the R5 and has done in all of the R Series cameras that we have tested it in. We have tried multiple cards but the problem persists. It's even slower than the Angelbird V60 UHS-II card.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	66	26.98
CRAW (20.7MB)	145	36.36
JPEG L (16.1MB)	168	33.41
HEIF L (18.9MB) 12 FPS	183	33.53
RAW (46.1MB) + JPEG L (16.1MB)	63	41.06
CRAW (20.7MB) + JPEG L (16.1MB)	112	55.25
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	65	42.65
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	116	62.75

23. Sony SF-E SDXC UHS-II (64GB)

Bus Type: UHS-II
Capacities: 64GB, 128GB, 256GB (SDXC)
Maximum Read Speed: 270 MB/s
Maximum Write Speed: 64GB 70 MB/s, 128GB + 256GB 120 MB/s
Minimum Write Speed: 64GB 30 MB/s, 128GB and higher 60 MB/s
Video Rating: 64GB V30, 128GB and higher V60

During our tests with this card the R5 in-camera write speed was approximately 74 MB/s when shooting in RAW + JPEG L.

Image Type	Shots Before Hitting Buffer (Max Burst)	Time to Clear Buffer (Seconds)
RAW (46.1MB)	63	36.13
CRAW (20.7MB)	145	33.23
JPEG L (16.1MB)	163	26.51
HEIF L (18.9MB) 12 FPS	194	28.85
RAW (46.1MB) + JPEG L (16.1MB)	63	49.72
CRAW (20.7MB) + JPEG L (16.1MB)	109	48.22
RAW (46.1MB) + HEIF L (18.9MB) 12 FPS	63	54.67
CRAW (20.7MB) + HEIF L (18.9MB) 12 FPS	114	59.03

Recording to Multiple Cards

When utilizing the option “Rec. to Multiple” the same image type will be written to the cards in both slot 1 and slot 2.

Unfortunately with this setup the write speed is limited by the slowest card which will be the UHS-II card in slot 2.

Recording Separately

When utilizing the option “Rec. Separately” you can write a different image type to slot 1 and slot 2.

Our recommended setup is to record the larger RAW or CRAW images to the faster CFexpress Type-B card in slot 1 and the smaller JPEGs to a UHS-II card in slot 2.

With this setup you can write 63 RAW images to slot 1 and 63 JPEG L images to slot 2 before the buffer is full. The buffer will then clear in around 4 seconds.

Writing RAW images to slot 2 and JPEG L to slot 1 would take around 10 seconds to clear the buffer.

Memory Cards for Recording Video

If you plan to shoot 8k or 4k with the higher bitrate settings then you will need a CFexpress Type-B card.

You can still use an SD card for shooting in 8k or 4k but only with lower bitrates or Full-HD, the card will need to meet the speed class shown in the table.

Canon R5 Compatible Memory Cards for Video

In the table above Canon mentions “Refer to the Canon website” for further details on the supported CFexpress Type-B cards, here is that link. Unfortunately their list has not been refreshed since July 2020.

Movie Recording Times

The amount of time that you can record for will vary greatly based on the size of memory card that you are using and the video format that you are recording in.

Estimated Recording Times with Canon Log 3 : OFF, HDR PQ : OFF

Estimated Recording Times with Canon Log 3: ON, HDR PQ : ON

About Our In-Camera Tests

We use manual focus with the ISO set to 100 and a minimum shutter speed of 1/250th which is sufficient to achieve 20 fps with the R5.

High ISO noise reduction is set to standard and we shoot the front cover of a book for consistency with the file sizes.

We always test the maximum continuous shooting speed of the camera which with the R5 is 20 fps when using he Electronic Shutter (Hi+). HEIF images (HDR PQ On) are restricted to the mechanical shutter / elec. first curtain only which reduces the maximum fps to12.

Then we simply time how long it takes to fill the buffer and then clear the buffer. We repeat this 3 times and average out the results.

You can easily carry out these tests yourself but your results may be slightly different since the file size will vary based on the scene being shot. The number of shots before the buffer is hit can also vary based on your camera settings such as ISO and noise reduction.

Performance can also vary by card capacity so these results are only valid for the sizes tested here.

Tags: Canon r5