The Phison E28 Engineering Sample is a solid-state drive in the M.2 2280 form factor, launched on January 7th, 2024. It is only available in the 2 TB capacity listed on this page. With the rest of the system, the Phison E28 Engineering Sample interfaces using a PCI-Express 5.0 x4 connection. The SSD controller is the PS5028-E28-86 from Phison, a DRAM cache chip is available. Phison has installed 218-layer TLC NAND flash on the E28 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 soaked up more quickly. Thanks to support for the fast PCI-Express 5.0 interface, performance is excellent. The E28 Engineering Sample is rated for sequential read speeds of up to 14,500 MB/s and 14,500 MB/s write; random IOPS reach up to 3000K for reads and 3000K for writes.
The SSD's price at launch is unknown. The TBW rating for the Phison E28 Engineering Sample 2 TB is unknown, too.