8800gt not performing well PLZ HELP!

My money is on Vista this is why,
1. Vista can run DX10 maybe the game you are using as a benchmark runs DX10 and XP runs DX9. If thats not the case and the game only uses DX9 still Vista will drag down the fps in comparison to XP.
2. Vista uses a lot more RAM than XP that could hurt game performance as well.
3. You swaped cards so you know it isn't something to do with the cards it has to be another variable. The most likely cause is Vista. not your mobo. Mother boards have no effect on game performance.

but it shouldnt be a 75% difference in fps...thats what i dont understand

MAKE SURE YOUR DRIVER SETTINGS ARE CORRECT, sounds like you might have vsync and supersampling on, which will kill performance on any system. It can make a big difference in image quality and performance to have the right balance in your driver settings. Also make sure you have your services and OS settings set so you do not have all of your software running a service at boot, which can also really hurt your performance. Make sure that the drivers are uninstalled properly. I friend of mine that had problems with drivers on vista got big numbers after the driver was unintalled and installed properly. These images show my driver settings which are the same as what most test mag's and websites use. Its the right balance between performance and quality. vsync needs to be off and supersampling kills games with no real benifit in image quality.

http://downloads.guru3d.com/download.php?det=745

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ya it would not hit you at 75%, its your startup programs. You type msconfig in run or search on vista and you see what it running at boot it helps you use less ram. You can shutoff windows services and useless software services like quicktime, nero, etc. This will give you just a little performance kick, like 5% it's not the 75% issue you are having.
http://www.theeldergeekvista.com/

Your driver settings are the same as mine?

Ok well I will get my friend to post on here. He had massive performance loss with his card and it was a driver issue. He had to uninstall everything nvidia on his c drive and he cleared the registry of nvidia as well, then he got the correct driver installed and his performance is now what it should be for 8800 gt on vista. You may have uninstalled driver with add and remove programs but that does not mean its gone, it can still be playing havoc with your system. It needs to be completley uninstalled.

I guarantee it's not Vista. I would have accepted that answer a year ago but not today. I was running a 8800GT, 2GB of RAM on Vista Ultimate and it was flawless in COD4 at 1920x1200, maxed out. I'm guessing its a driver issue or you might have a defective card.

Thats your problem, thats it! unconnect the net when you do it and hit cancel when that windows installer comes up.

Download the nvidia driver and SAVE it on your desktop

http://www.nvidia.com/object/winvi [...] _whql.html

After you completely remove nvidia software you should be in 800x600......then
reboot with net disconnected and hit cancel on windows popup then install driver. It says that in the notes of the driver cleaner software link I left for you to download. You can not let windows install driver that is your problem 100%

Always unhook your computer from the internet when installing a new OS install, thats when you most at risk.

I aways use Driver Cleaner Pro whenever I update my Nvidia drivers, because old entries remain even after uninstalling them.

I remember the first time that I used Driver Cleaner Pro, there were soo many old entires deleted the first time.

Wat drivers are u running? maybe try a different set of forceware drivers, and yes wat u did seems fine, except not sure why u uninstalled the generic drivers, ur card needs a driver to run surely? did u run driver cleaner in safe mode?

core clock ROP domain 702

core clock shader domain 1458

memory clock 1053

core temp 51C under load

these are for a msi 8600gts oc

the gigabyte p35 has a great memory auto volt, check to see if you need to up yours some. Could make all the diff

Ya shud do exactly wat syslord has said, then report back with wats happened