Seagate Momentus 5400.3 40 GB

A 40GB 2.5" HDD on the PATA 44-Pin 100 interface. At roughly $2.38 per gigabyte it sits in the mid-range tier. Sequential throughput reaches 550 MB/s reads and 520 MB/s writes, backed by 8MB of cache. Expect to pay around $95.00, which lands it among mid-range options.

Use the PlanMyPC system builder to verify it works alongside your other components and to watch live retailer pricing. 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.