Expect cards featuring the improved performance as soon as early 2024.
which can double the theoretical throughput performance compared to current cards while maintaining backward compatibility.
The new CFexpress 4.0 specification doubles the theoretical maximum throughput across all three of these form factors without changing their physical dimensions, bringing the new Type A design into line with speeds currently found in Type B designs, which is a significant upgrade. Type B cards also should get much faster.
, PCIe Gen 3 operates at 8 GT/s which roughly translates to 1 GB/s per PCIe lane. By comparison, PCIe Gen 4 operates at 16 GT/s, or around 2 GB/s per PCIe lane.It should be noted that memory cards rarely reach the theoretical maximums of any specification, but new maximums as part of updated specifications always introduce notable speed improvements.
The CFA says that it is also going to prepare a new specification for VPG , which currently only certifies cards, stating that a card will never dip below 400 MB/s transfer speeds. The organization says that the new specification will allow for higher sustained video recording and will be released “in the near future.”
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