The Canon EOS R5 II features two memory card slots and is compatible with CFexpress Type B cards in slot 1 and SD/SDHC/SDXC (UHS-II / UHS-I) cards in slot 2.
If you want to record to both card slots simultaneously the write speed will be restricted by the slowest card which will be the UHS-II / UHS-I card in slot 2. For the best performance we recommend recording RAW to slot 1 (CFexpress) and JPEG to slot 2 (UHS-II). We also recommend choosing one of the faster UHS-II V90 cards.
Recommended CFexpress Type B Cards
Our top 10 recommended CFexpress Type B cards based on speed and reliability for the Canon R5 Mark II are:
| CFexpress Type B Memory Card | Max Write Speed | Max Read Speed | Video Rating | CFexpress Standard |
|---|---|---|---|---|
| Delkin Devices BLACK 4.0 | 3200 MB/s | 3600 MB/s | VPG400 | 4.0 |
| Lexar Professional DIAMOND Series | 1700 MB/s | 1900 MB/s | VPG400 | 2.0 |
| SanDisk PRO-CINEMA | 1500 MB/s | 1700 MB/s | VPG400 | 2.0 |
| Nextorage NX-B2 PRO Series | 3600 MB/s | 3900 MB/s | VPG400 | 4.0 |
| Delkin Devices POWER G4 | 1700 MB/s | 1780 MB/s | NA | 2.0 |
| Angelbird AV Pro SE | 850 MB/s | 1785 MB/s | NA | 2.0 |
| Lexar Professional GOLD Series | 1500 MB/s | 1750 MB/s | NA | 2.0 |
| Lexar Professional SILVER Series | 1300 MB/s | 1750 MB/s | NA | 2.0 |
| ProGrade Digital 4.0 Gold | 3000 MB/s | 3400 MB/s | NA | 4.0 |
| ProGrade Digital Iridium | 3000 MB/s | 3550 MB/s | VPG400 | 4.0 |
Recommended UHS-II SDXC Cards
Our top 10 recommended UHS-II SDXC cards based on speed and reliability for the Canon R5 Mark II are:
| UHS-II Card | Max Write Speed | Max Read Speed | Video Speed Class |
|---|---|---|---|
| Delkin Devices BLACK | 250 MB/s | 300 MB/s | V90 |
| Delkin Devices Power | 250 MB/s | 300 MB/s | V90 |
| Angelbird AV PRO SD (MK2) | 280 MB/s | 300 MB/s | V90 |
| Nextorage NX-F2PRO | 299 MB/s | 300 MB/s | V90 |
| SanDisk Extreme Pro | 260 MB/s | 300 MB/s | V90 |
| Sony SF-G Tough | 299 MB/s | 300 MB/s | V90 |
| Lexar Professional GOLD 2000X | 260 MB/s | 300 MB/s | V90 |
| OWC Atlas Ultra | 250 MB/s | 300 MB/s | V90 |
| Lexar Professional GOLD 1800x | 210 MB/s | 280 MB/s | V60 |
| Nextorage NX-F2SE Series | 100 MB/s | 280 MB/s | V60 |
Memory Cards for Video
For videographers we would recommend a CFexpress Type B card that is VPG 400 certified. This guarantees a minimum sustained write speed of 400 MB/s which is fast enough to support shooting in up to 8K RAW Standard (29.97p/25.00p/24.00p/23.98p) Approx. 2600 Mbps (325 MB/s). This is the most demanding video recording option for the R5 Mark II.
Our In-Camera Buffer Tests
Our memory card recommendations are based off our extensive Canon R5 Mark I Buffer Tests where we have tested 47 memory cards in-camera. Once the R5 II is available to us we hope to test this camera as well but we expect to see similar results.
Is CFexpress 4.0 Supported?
The CFexpress 2.0 standard is supported but not the latest 4.0 standard. However you can still use CFexpress 4.0 cards in the R5 Mark II 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.
Full specifications for the Canon R5 Mark II can be found on Canon's website.
