Inconsistent WEI

[churin]

I have two W7x64s installed on the same machine but each OS is installed on its own separate physical hard drive. The WEI for #1 OS is 6.8/7.4/6.0/6.0/5.9 while that for #2 is 6.9/7.4/7.4/7.4/5.9.
I wonder why there are so much difference between the two for the graphic performances.
The two HDDs are not the same model but are very similar. The one for #1 OS is HitachiHDE721010SLA330 and another for #2 is Hitachi [FONT=&quot]HDS721010CLA332. Both are 1TB/7200rpm/32MB but the second one is newer model.
Has the performance of the HDD anything to do with the graphic performance?
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[Frostmourne]

The second is better although that is high. My gaming rig received 6.5/7.4/7.6/7.6/5.9.

 

[bcsaji]

bit similar issue

I have a bit similar issue, but the difference is not that big. The motherboard of my notebook has been recently replaced (due to a malfunction in the integrated card reader) with a similar one (at least in theory they were similar), and after the change the WEI scores of my graphics performance decreased. Previously, the WEI of my desktop/gaming performance were 6.7/6.7 and now they are 6.6/6.6 on the same hardware. I re-run the assessment a few times, but I always got the same scores. Ok, its not a big difference, but still a bit disturbing.