Western Digital Caviar Black 640 GB

A 640GB 3.5" HDD on the SATA interface. Sequential throughput tops out at 550 MB/s reads and 520 MB/s writes, backed by 64MB of cache. At roughly $0.05 per gigabyte it sits in the budget tier. SATA throughput caps near 550 MB/s — fine for game libraries and backups, slower for heavy scratch work.

Expect to pay around $34.36, which lands it among budget options. Drop it into the PlanMyPC builder to check compatibility with the rest of your parts and compare current drive prices across retailers. Western Digital backs the product through its standard warranty channels; check the listing for region-specific terms.