Hitachi Ultrastar 7K4000 4 TB

A 4000GB 3.5" HDD on the SAS 6.0 Gb/s interface. Sequential throughput reaches 550 MB/s reads and 520 MB/s writes, backed by 64MB of cache. At roughly $0.04 per gigabyte it sits in the high-end tier. Its $175.00 price tag places it squarely in high-end territory.

Use the PlanMyPC system builder to verify it works alongside your other components and to watch live retailer pricing. Hitachi backs the product through its standard warranty channels; check the listing for region-specific terms. Scroll down for the complete spec table; the builder's compatibility checker will warn you about any conflicts with components you have already picked.