Western Digital Caviar Black 750 GB

A 750GB 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 $0.31 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 $229.95, which lands it among high-end options. PlanMyPC's builder flags compatibility problems automatically and adds the part's price to your build total. Support and warranty service run through Western Digital, with terms that vary by region. The full specification sheet below breaks out every listed detail, and the compatibility checker flags conflicts with parts already in your build.