Seagate Constellation ES 500 GB

A 500GB 3.5" HDD on the SAS 6.0 Gb/s interface. At roughly $0.18 per gigabyte it sits in the mid-range tier. Sequential throughput tops out at 550 MB/s reads and 520 MB/s writes, backed by 64MB of cache. At $89.99 it sits in the mid-range drive bracket.

Drop it into the PlanMyPC builder to check compatibility with the rest of your parts and compare current drive prices across retailers. 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.