Seagate Constellation ES.2 3 TB

This is a 3000GB 3.5" HDD on the SAS 6.0 Gb/s interface. Sequential throughput tops out at 550 MB/s reads and 520 MB/s writes, backed by 64MB of cache. At roughly $0.03 per gigabyte it sits in the mid-range tier. Its $83.99 price tag places it squarely in mid-range territory.

Use the PlanMyPC system builder to verify it works alongside your other components and to keep a running tally of the cost. Support and warranty service run through Seagate, 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.