The Samsung 990 Evo is a solid-state drive in the M.2 2280 form factor, launched in 2024. It is available in capacities ranging from 1 TB to 2 TB. This page reports specifications for the 2 TB variant. With the rest of the system, the Samsung 990 Evo interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the Piccolo (S4LY022) from Samsung, a DRAM cache is not available. Samsung has installed 133-layer TLC NAND flash on the 990 Evo, the flash chips are made by Samsung. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are processed more quickly. The cache is sized at 114 GB, once it is full, writes complete at 1700 MB/s. Copying data out of the SLC cache (folding) completes at 1200 MB/s. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The 990 Evo is rated for sequential read speeds of up to 5,000 MB/s and 4,200 MB/s write; random IOPS reach up to 700K for reads and 800K for writes.
The SSD's price at launch is unknown. The warranty length is set to five years, which is an excellent warranty period. Samsung guarantees an endurance rating of 1200 TBW, a typical value for consumer SSDs.