The Crucial X8 is a solid-state drive in the M.2 2280 form factor, launched on October 25th, 2019. It is available in capacities ranging from 500 GB to 4 TB. This page reports specifications for the 1 TB variant. With the rest of the system, the Crucial X8 interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the SM2263EN from Silicon Motion, a DRAM cache chip is available. Crucial has installed 64-layer QLC NAND flash on the X8, the flash chips are made by Micron. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are handled more quickly. The cache is sized at 197 GB. Copying data out of the SLC cache (folding) completes at 100 MB/s. The X8 is rated for sequential read speeds of up to 1,050 MB/s and 1,000 MB/s write; random IO reaches 64K IOPS for read and 69K for writes.
At its launch, the SSD was priced at 165 USD. The warranty length is set to three years, which is above average, but shorter than the five years offered by many other vendors. The TBW rating for the Crucial X8 1 TB is unknown.