The Sabrent CFExpress B 512GB Card is a large-capacity memory card designed for the latest batch of high-resolution cameras. Interestingly the card is well-balanced and doesn’t push the speed of the technology, which means that it’s slightly cheaper than many of its rivals.
However, while it might not be as fast as some, it’s still double the speed of the fastest UHS-II SD cards I’ve tested, and will far outperform most cameras presently on the market, including the Canon EOS R5’s requirements.
Based on the CFExpress type B size, the card features x2 PCIe 3.0 interface with a 3W power draw. Sabrent states that in an ideal circumstance, the card has a transfer speed of 1700MB/s, 1700MB/s read and 1500MB/s write. Interestingly they also put down the sustain transfer rates, which drop to 1600MB/s read and 400MB/s write. I’m not sure they have this right, as in our test, the sustain write speed was far higher.
High endurance technology is used inside through LDPC, RAID ECC, End-to-end data protection, SmartRefresh, static and dynamic wear-levelling, defect management and over-provisioning.
The card also supports TRIM, SMART, TCG OPAL/Pyrite and features upgradeable firmware. This all points towards this card being able to be used for other applications besides simply a storage device for images and video.
Unbelievably the 512GB version of the card is the smallest denomination, with a 1TB version also available.