Best Memory Card for Canon EOS-1D X Mark II
The Canon EOS-1D X Mark II is a legendary speed demon, but its dual-slot design—one CFast 2.0 and one CompactFlash—often leaves photographers scratching their heads. To unlock 4K video at 60fps or sustain those blistering 14fps bursts, you absolutely need the right glass-and-silicon combo. After years of shooting sports and wildlife with this workhorse, I’ve found that the SanDisk Extreme PRO CFast 2.0 remains the gold standard for reliability. Here is the definitive guide to fueling your 1D X Mark II.
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Best Memory Cards for Canon EOS-1D X Mark II: Detailed Reviews
SanDisk Extreme PRO CFast 2.0 View on Amazon View on B&H
When the Canon EOS-1D X Mark II launched, it practically debuted alongside the SanDisk Extreme PRO CFast 2.0, and they remain the perfect pair. This card is essential if you want to record 4K video at 60fps or capture up to 170 RAW frames in a single continuous burst without the buffer stuttering. I’ve used these in pouring rain at football matches, and they’ve never corrupted a single file. With write speeds of up to 450MB/s, it handles the massive data throughput of the camera’s DIGIC 6+ processors with ease. While CFast 2.0 media is significantly more expensive than standard SD cards, the peace of mind you get with SanDisk’s build quality is worth every penny. The only minor drawback is the price per gigabyte, but for a flagship body like the 1D X Mark II, you shouldn’t cut corners on the storage media.
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Lexar Professional 3500x CFast 2.0 View on Amazon View on B&H
Lexar has long been the primary rival to SanDisk, and their 3500x CFast 2.0 card offers nearly identical performance at a slightly more palatable price point. In real-world testing with the 1D X Mark II, I noticed that offloading files to my MacBook was incredibly snappy thanks to the 525MB/s read speed. It fully supports the VPG-130 specification, meaning it guarantees a minimum sustained write speed of 130MB/s—crucial for those long 4K video takes. While some older Lexar cards had a reputation for variability, the 3500x series has proven to be a stable workhorse. If you are looking to buy multiple cards for a long trip or a wedding shoot, the savings here add up quickly without sacrificing the frame rates you bought this camera for. It’s the perfect middle ground for the serious enthusiast who needs professional specs on a tighter budget.
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SanDisk Extreme PRO CompactFlash View on Amazon View on B&H
The 1D X Mark II features a “legacy” CompactFlash slot alongside the CFast slot. While this CF slot cannot handle 4K 60fps video or the maximum RAW burst depth, it is perfect for saving JPEGs or acting as an overflow for standard 1080p video. The SanDisk Extreme PRO CF card (160MB/s) is the fastest UDMA 7 card you can get. I use this primarily in the second slot to record a low-res JPEG backup while the CFast card handles the heavy lifting. It’s much cheaper than CFast media and allows you to keep shooting if you run out of primary space. Just be aware: if you set the camera to “Record Separately” or “Mirror,” your overall speed will be throttled by this slower CF card. For studio portraits or landscapes where speed isn’t life-or-death, this is a very reliable and affordable choice.
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ProGrade Digital CFast 2.0 (Gold) View on Amazon View on B&H
ProGrade Digital was founded by former Lexar executives, and their CFast 2.0 Gold cards are designed specifically for high-duty cycle applications. If you are using your 1D X Mark II as a cinema camera, this is the card you want. It offers sustained write speeds of up to 450MB/s and is built to withstand extreme temperatures—perfect if you’re shooting on a hot sideline or in a frozen forest. What sets ProGrade apart is their “Refresh” software, which allows you to monitor the health of your card and deep-clean the flash memory to restore it to factory speeds. I find this incredibly useful for professional work where a card failure isn’t just an inconvenience, it’s a disaster. It’s a premium product with a price tag to match, but for those who demand the absolute best in data integrity, ProGrade is the new industry leader.
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Angelbird AV PRO CF View on Amazon View on B&H
Angelbird is an Austrian company that has carved out a niche in the high-end video market. Their AV PRO CF card is specifically engineered to avoid the “frame dropping” that can occur when a card’s write speed fluctuates. This “Stable Stream” technology makes it an excellent choice for the 1D X Mark II’s 800Mbps MJPEG 4K recording. I’ve found that these cards run slightly cooler than the SanDisk equivalents during long video takes, which is a nice bonus. They also come with a fantastic data recovery service if you register the product. The build quality is metallic and robust, giving it a premium feel that matches the tank-like build of the Canon 1-series. While it might be a lesser-known brand to some photographers, the cinema crowd swears by them, and they work flawlessly in Canon’s high-end DSLR bodies.
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Buying Guide: How to Choose the Best Memory Card for Canon EOS-1D X Mark II
Comparison Table
| Product | Best For | Rating | Price |
|---|---|---|---|
| SanDisk Extreme PRO CFast | Professional Action | ★★★★★ | Check |
| Lexar Professional 3500x | High-Speed Value | ★★★★☆ | Check |
| SanDisk CompactFlash | Backup/JPEGs | ★★★★☆ | Check |
| ProGrade Digital Gold | Cinema Production | ★★★★★ | Check |
| Angelbird AV PRO CF | Stable Video | ★★★★☆ | Check |
Frequently Asked Questions
Can I use a standard CompactFlash card to record 4K 60fps video?
No, you cannot. While the 1D X Mark II has a CompactFlash slot, it is limited to UDMA 7 speeds (roughly 160MB/s). The 4K 60fps video mode requires the much higher bandwidth of the CFast 2.0 slot. If you attempt to record 4K 60fps to a standard CF card, the recording will likely stop after a few seconds once the internal buffer is full.
Does the Canon 1D X Mark II support CFexpress cards?
Unfortunately, no. While CFexpress cards look similar to CFast cards, they use a different interface (PCIe vs. SATA). The 1D X Mark II was designed before CFexpress became the industry standard. This is a common point of confusion for those upgrading from newer mirrorless cameras back to this DSLR classic. You must stick to CFast 2.0 for the high-speed slot.
Why are CFast 2.0 cards so much more expensive than SD cards?
CFast 2.0 cards use a more complex SATA interface, similar to what you’d find in a solid-state drive (SSD). They are built with much higher durability standards and offer significantly higher sustained write speeds compared to traditional UHS-I or even most UHS-II SD cards. Because they are a niche professional format, the manufacturing volume is lower, keeping the prices relatively high.
Is it better to use two cards at once for redundancy?
For critical work like weddings or sports, yes. However, be aware that the 1D X Mark II will be throttled by the slower CompactFlash slot. If you are shooting 14fps RAW bursts, the camera will slow down once the CF card’s slower write speed becomes the bottleneck. Many professionals choose to write RAW files to the CFast card and small JPEGs to the CF card to maintain speed.
What size card do I need for a full day of shooting?
For photography, a 64GB card can hold roughly 1,500 RAW files. For 4K video, however, the file sizes are massive due to the Motion JPEG codec. A 128GB card will only give you about 20-25 minutes of 4K 60fps footage. If you plan on shooting video extensively, I highly recommend carrying at least two 256GB CFast 2.0 cards to get through a production day.
Final Verdict
To truly unlock the beast that is the Canon EOS-1D X Mark II, you cannot skip on a high-quality CFast 2.0 card. For 90% of professional users, the SanDisk Extreme PRO is the card that won’t let you down in the field. If you are a filmmaker, the ProGrade or Angelbird options offer specialized features that ensure consistent bitrates. Whatever you choose, ensure you have at least one CFast card to take advantage of those legendary frame rates!
