Western Digital Caviar Black and RE4 2TB Drives Review
HD Tach Tests
Simpli Software's HD Tach is a low-level drive test for just about every type of non-optical storage. It tests hard drives both internal and external, flash drives, RAID arrays, and more. Of course, we used it on the hard drives featured here to test random access time (lower is better), CPU utilization (ditto), and read performance (higher is better):
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Another slim lead for the WD Caviar Black, but what's this? Look at the CPU utilization scores. This drive chokes the quad-core processor in our test system three percentage points higher than the other two drives. 
Will that affect the performance in the real world? It's time to test some raw game loading times and find out.
