Windows 7 Assesment Scoring Failure for RAID0 ?

Hello :),

I recently purchased 2 x HDD Western Digital Caviar Black EX, 640GB, 7200rpm, 64MB, SATA 3 (WD6402AAEX) and put them in RAID0.
I've installed Windows 7 x64 and HDD's connected with SATA III cable and enabled from BIOS (rest of the system is not important but for whom wants to know is: Motherboard: Asus M4A89TD-PRO-USB3, Proc: AMD Phenom II 1050T, RAM:Corsair 2 x 2 Gb-DDR3-1600MHz CMX4GX3M2A1600C8).
I have installed all motherboard drivers ofc after installing fresh Win 7 x64, and run the Windows Assesment Benchmark.

Surprise: all components went up to 7.4 but HDD's only got 5.9 Scoring .
Hmm, I ran the HD Tune Benchmark to see what's wrong with my HDD's. Nothing wrong with them, the benchmark results were these:
Transfer rate:
min: 112.1 MB/sec,
max: 203.2 MB/sec,
Average: 166.6 MB/sec.,
Access Time: 11.1 ms,
Burst Rate: 132.8 MB/sec.

I said ok. Let's change the HDD. I've took another HDD for comparison. Same company Western Digital WD3200AAKS 320 Gb. I've put is on SATA II full speed 3.0 Gb/sec normal SATA mode (not RAID). Reinstalled the above system, as well all drivers installed, then re-run the Windows Assesment Benchmark.

Surprise again: all other components had the same 7.4 score, the new HDD WD3200AAKS again, same score: 5.9. I said, something must be wrong. I re-ran the HD Tune Benchmark to make sure these are accurate values, and I got:
Transfer rate:
min: 43.2 MB/sec,
max: 108.6 MB/sec,
Average: 86.5 MB/sec.,
Access Time: 15.5 ms,
Burst Rate: 136.7 MB/sec.

Normal values, almost half of the RAID0 configuration. Still, Windows sees both HDD configurations as having same scoring. Why is that?

Thanks in advance,
ChiefRA

Thats normal. you need to have an SSD to get higher WEI scores for your drive.

Ken