Seagate Momentus 5400.6 320 GB

This is a 320GB 2.5" HDD on the SATA interface. Sequential throughput tops out at 550 MB/s reads and 520 MB/s writes, backed by 8MB of cache. At roughly $0.14 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.

At $44.39 it sits in the budget drive bracket. PlanMyPC's builder flags compatibility problems automatically and tracks the latest drive deals from multiple stores. Support and warranty service run through Seagate, with terms that vary by region. Scroll down for the complete spec table; the builder's compatibility checker will warn you about any conflicts with components you have already picked.