Windows 7 Eperience Index drops with 64-bit OS..

I re-installed my laptop (T7200) with W7 64-bit HP rather than the 32-bit I had been running and found the Windows Experience Index fell from 5.1 to 3.5 .. notably the processor score fell to 3.5,

Why and does it indicate worse performance?
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chrisfixitAsked:
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CSI-WindowsConnect With a Mentor Commented:
Windows Experience Index is notoriously inconsistent.  It can report different numbers on the same machine when no changes have been made.

If you still have 32-bit installed (dual-boot), I would recommend you use an independent performance benchmarking tool.  Passmark is a good one.  They have 32-bit and 64-bit editions.  You should probably read up on whether comparing the results of the 32-bit edition with the 64-bit edition is a valid comparison.  It might be that you should run the 32-bit version on both OSes - especially since most of your software will still be 32-bit on the 64-bit OS.
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CrowaXCommented:
Try downloading your chipset drivers for your motherboard. The ones included with windows may not be very optimized.
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