You can read more about TweakTown's Storage Product Testing Workstation and the procedures followed to test products in this article.
In order to fully utilize SATA III you need a system with native SATA III support. P67, Z68 and X79 systems are preferred, but AMD has made advances in their newer SATA III systems as well. Older X58 systems with Marvell based SATA III do not deliver the same high levels of performance, so we recommend newer systems when available.
ATTO Baseline Performance
Version and / or Patch Used: 2.34
ATTO is used by many disk manufacturers to determine the read and write speeds that will be presented to customers.
SanDisk Extreme 240GB
Plextor M3 Pro 256GB
Both drives read well over 500MB/s, but the Extreme has a solid 20MB/s advantage when reading data. That advantage moves to nearly 90MB/s when writing data, but these numbers are mainly used for marketing and seeing peak performance under ideal conditions.