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Help me solve this mystery

Jun 25, 2008
2,036 (0.58/day)
Dundalk, Maryland
System Name Xeon 2017
Processor Intel® Xeon® Processor X3360 12M Cache, 2.83 GHz, 1333 MHz
Motherboard Dell Inc. 0200DY (CPU)
Cooling Speed Fan
Memory 4.00GB Single-Channel DDR3
Video Card(s) Dell 1GB GDDR5 ATI FirePro V4800 (FireGL V)
Storage WD 500GB + 465GB TOSHIBA External USB 3.0
Display(s) Acer 21inch Monitor LCD
Case Dell Optiplex 780 SFF
Audio Device(s) SoundMAX Integrated Digital HD
Power Supply Thermaltake TR2 W0070RUC ATX 430W Power Supply
Mouse Dynex Grey and Black
Keyboard HP Wireless
Software Windows 7 Ultimate x64 SP1
Q6600 + Windows 7 + 550 ti + 301.42( best drivers for my card ) + Need for Speed Hot pursuit 2010 = GPU Usage stuck at 44% / 1600x900 = 19-27-50 fps, 1920x1080 = 17-30
1360x768 = 20-44.

Q6600 + Windows XP 64 + 550 ti + 301.42( best drivers for my card ) + Need for Speed Hot pursuit 2010 = GPU Usage 99% 1920x1080 = 55-60 frames all the time


I don't understand why on windows 7 nfs 2010 runs like crap, but on XP moving at 55-60 frames without any problems at 1920x1080. And the funny thing going back to windows 7 its the only game that i have trouble with. No point in going back to XP on this rig anyway because games work better in windows 7 now due to me installing those perfect 301.42 drivers which seems to be the correct driver for my 5500. Any ideas?

Is my CPU bottlecking the GPU only in windows 7?
should i test out my amd 5750 with NFS ?
Trust me changing drivers won't help, i pretty much tried every nvidia driver for my card, all from the 260-270-280- and recent ones.
Is there a CPU optimizer for the Q6600 i don't know about?
Is there a CPU optimizer for the motherboard i don't know about?
I am upgrading to a new CPU soon, just thought until i do so, maybe i can figure out what the issue is.

Also why is my CPU speed not at 2.4ghz right now?

When idle isn't the cpu still suppose to be at 2.4?