The Canon EOS R3 features two memory card slots and is compatible with two different types of memory card.
One slot supports the extremely fast CFexpress Type B cards and the other slot supports UHS-II SD/SDHC/SDXC cards but is also backwards compatible with UHS-I SD cards.
We have so far tested 13 CFexpress Type-B and 14 UHS-II SD cards in the Canon R3 to see how they actually perform in-camera. This helps us to provide more real-world advice on which cards to buy rather than just relying on label speeds.
Below you'll find a short summary of our top ten results. We'd recommend visiting our Canon R3 Memory Card Speed & Buffer Test blog post if you'd like to view all of our comprehensive results including the time taken for each card to clear the buffer.
Canon R3 CFexpress Type-B Memory Card In-Camera Test Summary
| CFexpress Type-B Card | In-Camera Write Speed * | Max Burst * |
|---|---|---|
| 1. Delkin Devices BLACK 325GB |
408 MB/s |
156 |
| 2. Sony CEB-G Series TOUGH 128GB |
407 MB/s |
155 |
| 3. Angelbird AV PRO SX 160GB |
405 MB/s |
156 |
| 4. ProGrade Digital Cobalt 325GB |
405 MB/s |
155 |
| 5. Delkin Devices POWER 128GB |
404 MB/s |
155 |
| 6. Delkin Devices BLACK 128GB |
404 MB/s |
155 |
| 7. Lexar Professional DIAMOND Series 128GB |
403 MB/s |
155 |
| 8. Lexar Professional GOLD Series 128GB |
402 MB/s |
156 |
| 9. Lexar Professional SILVER Series 128GB |
399 MB/s |
155 |
| 10. SanDisk Extreme PRO 128GB |
393 MB/s |
155 |
* When shooting RAW in Hi+ with the Electronic Shutter (30 FPS)
Canon R3 UHS-II SD Memory Card In-Camera Test Summary
| UHS-II SD Card | In-Camera Write Speed * | Max Burst * | Video Rating |
|---|---|---|---|
| 1. Sony SF-G Tough |
245 MB/s |
150 | V90 |
| 2. Kingston Canvas React Plus |
236 MB/s |
150 | V90 |
| 3. Lexar Professional 2000X UHS-II |
230 MB/s |
150 | V90 |
| 4. Delkin Devices POWER UHS-II |
225 MB/s |
150 | V90 |
| 5. Transcend SD 700S UHS-II |
225 MB/s |
150 | V90 |
| 6. ProGrade V90 UHS-II |
217 MB/s |
150 | V90 |
| 7. SanDisk Extreme Pro UHS-II |
214 MB/s |
150 | V90 |
| 8. Sony SF-M Tough UHS-II |
135 MB/s |
149 | V60 |
| 9. Sony SF-M UHS-II |
135 MB/s |
149 | V60 |
| 10. ProGrade V60 UHS-II |
123 MB/s |
150 | V60 |
* When shooting RAW in Hi+ with the Electronic Shutter (30 FPS)
