WD Black SN850X NVMe SSD vs WD Black SN770 NVMe SSD

The SN850X is the faster, more feature-rich drive: sequential reads up to 7,200 MB/s, writes up to 7,300 MB/s, a DRAM cache and Game Mode 2.0. The SN770 is the value pick: up to 5,150 MB/s reads and 4,900 MB/s writes, DRAM-less with nCache 4.0, and it runs cooler and draws less power. Both are PCIe Gen4 M.2 2280 drives with strong owner ratings, and the SN850X is the one to step up to for a main gaming or workstation drive.

• Choose the WD SN850X if you want the fastest Gen4 drive here for a primary gaming or work drive, large file transfers, or the biggest capacities.
• Choose the WD SN770 if you want a solid Gen4 gaming drive for less, a secondary or laptop drive, or a build where heat and power matter.