Aspire 3680, Aero Performance index

At laptop just bought, i had 3.1 as Aero performance index. I downloaded the most recent drivers for the GMA 950 from Intel (7.14.10.1329) and... surprise surprise... the index lowered to 2.5 ! Same with the drivers downloadable from Acer site, the index varies from 2.3 to 2.5 .
What happened ? There is a way to have again an Aero performance index over 3 ?

 

No offense but Windows Experience Index Score is useless


If you want to bench your laptop against others then use these programs(dont download 3dmarks since if for deticated GPUs)

If you want to increase your WEI score, then "hack" it

 

SuperPI might not be that accurate anymore. There is another program..

 

Yeah, its wPrime. Its for all CPUs unlike SuperPi(mainly for single cores/processors)

Measure your Dual/Multi Core Notebook CPU Speed - Bye Bye to SuperPI

I forgot the list didnt included.

 

Thanks, anyway i am not concerned about cpu speed, just i wished to know why changing vga drivers downgraded the Aero performance. Btw it seems that with an Aero index < than 3, Aero doesnt run.