The Phison E31T Engineering Sample will be a solid-state drive in the M.2 2280 form factor, that is expected to launch in 2024. It is only available in the 2 TB capacity listed on this page. With the rest of the system, the Phison E31T Engineering Sample interfaces using a PCI-Express 5.0 x4 connection. The SSD controller is the PS5031-E31T from Phison, a DRAM cache is not available. Phison has installed 218-layer TLC NAND flash on the E31T Engineering Sample, the flash chips are made by Kioxia. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are absorbed more quickly. The cache is sized at 440 GB, once it is full, writes complete at 1500 MB/s. Copying data out of the SLC cache (folding) completes at 800 MB/s. Thanks to support for the fast PCI-Express 5.0 interface, performance is excellent. The E31T Engineering Sample is rated for sequential read speeds of up to 10,300 MB/s and 8,600 MB/s write; random IO reaches 1300K IOPS for read and 1500K for writes.
We have no information regarding the price at release. Phison guarantees an endurance rating of 1200 TBW, a very low value compared to other SSDs. New information will be added to this page as soon as it becomes available.