How well is Windows 7 doing compared to Vista SP1 in matters of SSD performance? This has been tested now.
Windows 7 Beta vs. Windows Vista SP1: SSD read (picture: Tweaktown)
Running in RAID 0 mode Windows 7 Beta is able to reach a read rate of 130 MB/s while Vista SP1 reaches 125 MB/s. The Windows 7 Beta also has a burst that is 10 MB/s higher than Vista. With a single SSD 7 is still in front, but the difference between the two operating systems is small. 135 to 132 MB/s is the result of the average read test, the burst is still higher in Windows 7 - 155 versus 146 MB/s.
The write test in RAID 0 mode was affected by the ICH9R Southbridge of the used motherboard. Although 7 reached an average of 71 MB/s and Vista SP1 61 MB/s, the transfer rate temporarily dropped to 0 MB/s in both tests. A single SSD delivers a slightly better write result for the Windows 7 Beta and only the burst rate is noticeably higher again - 156 versus 146 MB/s.
The results recorded by Tweaktown attest the Windows 7 Beta 1 small but noticeable benefits. But the tests also revealed that a RAID 0 setup not necessarily results in a better performance.