SanDisk X600 128 GB

This is a 128GB M.2 2280 SSD on the SATA interface. Sequential throughput reaches 550 MB/s reads and 520 MB/s writes. At roughly $1.04 per gigabyte it sits in the high-end tier. SATA throughput caps near 550 MB/s — fine for game libraries and backups, slower for heavy scratch work.

Expect to pay around $133.20, which lands it among high-end options. PlanMyPC's builder flags compatibility problems automatically and adds the part's price to your build total. Warranty coverage follows SanDisk's standard policy — confirm regional terms on the listing. Scroll down for the complete spec table; the builder's compatibility checker will warn you about any conflicts with components you have already picked.