Best Memory Cards for Canon EOS R5
The Canon EOS R5 is a high-resolution powerhouse, but its 45MP sensor and 8K RAW video capabilities come with a massive catch: they demand extreme data speeds. If you use a subpar card, you’ll find your buffer filling in seconds or your video recording abruptly stopping. After testing dozens of cards in real-world wildlife and wedding scenarios, I’ve found that the Delkin Devices Black CFexpress is the gold standard for reliability. Here is how to pick the right storage for this beast.
Our Top Picks at a Glance
Best Memory Cards for Canon EOS R5: Detailed Reviews
Delkin Devices Black CFexpress Type B View on Amazon View on B&H
When you’re shooting 8K video or high-speed bursts of a bird in flight, the last thing you want is a “Card Error” message. The Delkin Black series is specifically designed for these high-stress environments. It offers a sustained write speed of 1530 MB/s, which comfortably exceeds the requirements for the R5’s most demanding video modes. I’ve personally found that these cards run slightly cooler than the competition during long 8K sessions, which helps delay the R5’s notorious overheating warnings. The ruggedized design is water and shockproof, adding peace of mind for travel photographers. While it is more expensive than “Silver” or “Gold” tier cards, the lifetime warranty and the 48-hour replacement policy make it an essential investment for working pros who cannot afford downtime. The only real drawback is the premium price tag, but for the R5, it’s worth every penny.
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ProGrade Digital CFexpress Type B Gold View on Amazon View on B&H
The ProGrade Digital Gold series hits the absolute sweet spot for most Canon EOS R5 owners. While the “Cobalt” series is their top-tier offering, the Gold version provides 1700 MB/s read and 1500 MB/s burst write speeds at a significantly lower cost. In my testing, it handles 4K 120p and high-speed RAW bursts without breaking a sweat. It can even handle 8K video for short periods, though it may struggle with sustained 8K RAW recording compared to more expensive cards. One unique advantage is ProGrade’s “Refresh Pro” software (sold separately), which allows you to monitor the health of your card and deep-clean the flash memory to maintain factory-fresh speeds. If you aren’t shooting 8K video all day long but still want a high-performance CFexpress card that won’t empty your bank account, this is the one to get. It’s reliable, fast, and much more affordable than the Delkin Black.
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Lexar Professional 1667x SDXC UHS-II View on Amazon View on B&H
The Canon R5 features dual card slots: one CFexpress and one SD. You shouldn’t try to record 8K to an SD card, but for high-resolution stills or standard 4K video, a good UHS-II SD card is a budget-friendly way to add storage. The Lexar 1667x is a V60-rated card, meaning it guarantees a minimum write speed of 60MB/s. In practice, it’s much faster for bursts. I find this card perfect for “backup” mode, where the camera writes JPEGs to the SD card while the CFexpress handles the RAW files. It’s significantly cheaper than the flagship V90 cards but still provides enough speed to keep the camera from lagging during moderate shooting. Just be aware that if you try to use this as your primary card for 20fps electronic shutter bursts, the buffer will take several seconds to clear. It’s an honest, hard-working card that provides excellent value for the second slot.
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Angelbird AV PRO CFexpress Type B MK2 View on Amazon View on B&H
If you are using the Canon EOS R5 as a cinema camera, the Angelbird AV PRO MK2 is the card you need. Unlike many cards that boast high “peak” speeds but drop off after a few seconds, the Angelbird is designed for sustained performance. It is VPG-400 certified, ensuring it never drops below 400 MB/s—a critical requirement for consistent 8K video capture. I’ve used these cards on multi-hour shoots and they handle the heat and data load with incredible stability. Angelbird also offers custom data recovery services, which is a massive safety net for high-stakes commercial work. They also offer higher capacities (up to 4TB), which is necessary because 8K RAW files will eat through a 128GB card in minutes. It is a significant investment, but for high-end video work, this is the most reliable card on the market today. Its industrial-grade build quality feels virtually indestructible in the hand.
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SanDisk Extreme Pro CFexpress Type B View on Amazon View on B&H
SanDisk is the name most photographers know and trust, and their Extreme Pro CFexpress cards are a solid, reliable choice for the EOS R5. These cards are readily available at almost any camera store worldwide, which makes them a great pick if you need to buy extra storage while on a trip. The write speeds are excellent for 45MP RAW stills, allowing you to fire off bursts without the camera hanging. While early versions of these cards had some reported heat issues in the R5, the current updated models are very stable. They don’t quite match the sustained write speeds of the Angelbird or the ruggedness of the Delkin Black, but they are incredibly consistent. For the average R5 user who splits their time between landscape, portrait, and travel photography, the SanDisk Extreme Pro is a “set it and forget it” option that performs exactly as advertised. It’s a safe, dependable choice for any kit bag.
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Buying Guide: How to Choose Memory Cards for Canon EOS R5
Comparison Table
| Product | Best For | Rating | Price |
|---|---|---|---|
| Delkin Black | Professional use | ★★★★★ | Check |
| ProGrade Gold | Balanced value | ★★★★☆ | Check |
| Lexar 1667x | SD Slot Backup | ★★★★☆ | Check |
| Angelbird MK2 | 8K Video | ★★★★★ | Check |
| SanDisk Extreme Pro | Travel/General | ★★★★☆ | Check |
Frequently Asked Questions
Can I use an SD card for 8K video on the R5?
No, the write speeds of even the fastest UHS-II SD cards (around 300MB/s) are not high enough to handle 8K RAW or 4K 120p video. The camera will typically prevent you from selecting these modes if only an SD card is present. You must use a CFexpress Type B card for high-bitrate video modes. Use the SD card for JPEGs or standard 4K 30p video instead.
What is the difference between CFexpress Type B and SD?
CFexpress Type B uses PCIe 3.0 technology, making it essentially a mini NVMe SSD. It is significantly faster than SD cards, with read speeds up to 1700MB/s compared to SD’s 300MB/s. The R5 requires this extra speed to clear its massive 45MP buffer during 20fps bursts. SD cards are smaller and cheaper but are limited by older technology that can’t keep up with the R5’s peak performance.
Do I need a V90 SD card for the second slot?
While a V90 card is the fastest SD available, most R5 users can get away with a V60 card like the Lexar 1667x. If you are using the second slot just for backup or overflow JPEGs, a V90 is overkill. However, if you want to record 4K 60p video directly to the SD card, a V90 card is a safer bet to ensure there are no dropped frames.
Will a faster card stop my R5 from overheating?
It won’t stop it entirely, but it can help. Some lower-quality cards generate more internal heat when writing data, which contributes to the camera’s overall temperature. High-end cards like the Delkin Black or Angelbird are designed with better thermal management. Using these cards, combined with the latest Canon firmware updates, will maximize your recording times before the heat limit is reached.
Is CFexpress Type B the same as XQD?
They share the same physical form factor, but they are not the same. CFexpress Type B is much faster. While some cameras (like Nikon’s Z series) can use both with a firmware update, the Canon EOS R5 only supports CFexpress Type B and will not work with XQD cards. Always ensure you are buying “Type B” specifically, as Type A and Type C will not fit the R5.
Final Verdict
For the professional who needs zero compromises, the Delkin Black is the clear winner for the Canon R5. It handles the 8K data rates and heat effortlessly. If you’re a hobbyist or wedding shooter who mostly sticks to 4K and stills, the ProGrade Gold offers nearly identical real-world performance for a much better price. Don’t forget to grab a Lexar 1667x for your SD slot to ensure you always have a backup of your precious shots!