[Solved] Very Low FPS In Windows 7 and Vista

Problem:
I used to have Windows XP and my games ran perfectly at very high FPS. After installing Windows 7 on a clean formated partition, im getting very low fps in games. I have 2 partitions on my 500 Gb hardrive. On the C partition i have Windows 7 and on my D partition i have tried multiple operating systems and tested games. I installed Windows 7 on the D partition twice, once 32 bit and 64 bit. Both have the same exact low fps issue. Ive also tried Vista and i get the same problem. Finally, after installing Windows XP my fps is smooth as it used to be. I am at a complete loss i have no idea why im getting such a HUGE fps difference.

SPECS:
CPU: Intel Core 2 Quad q6600 at 3.25 ghz
Graphics Card: EGVA GTX280 Superclocked
Motherboard: XFX 780i SLI
Power Supply: 750 watt
HD: Segate 500 GB 7200 RPM
RAM: 4 GB Corsair DDR2 800mhz

Here are some of the FPS in my games on Windows 7:
COD WAW - Goes down to 40 fps online and offline
Unreal Tournament 3 - Goes down to 50 fps during gameplay
Left 4 Dead- Goes down to 35 fps in combat
Team Fortress 2 - goes down to 40- 50 fps
Age of Empires 3 - Can get very slow ~50 fps
Crysis Wars- 25 fps
Batman Arkham Asylum- 46 fps average

WHAT I ALREADY DID:
1) reinstalled drivers countless times to no avail
2) checked temperatures - solid not high at all Cpu load- 50 C - GPU 75 C (heavy load)


I used to run these games maxed settings at very high fps so i KNOW i dont have a hardware problem. Please help me i know there are a lot of very talented and intelligent people on this forum and im at a complete loss. Ive tried everything. Please help me! Thanks in advance

Yes my partitions are both 250 GB and drivers are the correct ones for the os. Does the way the partitions are formatted have anything to do with it?

No. It makes no difference.

^How much RAM are you using when gaming? Also, any background processes eating up CPU/RAM?

anything? i have no idea what is wrong

thank you for response yes i have a 780 board but i really dont want to buy another one. anyone know of any possible fixes? i even updated the bios but it didnt work

thanks everyone for their responces so far, i really appreciate it
i have done a full CLEAN install on another hard drive. THE SAME PROBLEM OCCURED and now i have no idea what to do

i dont want to go back to xp this shoudl not be happening. this is an advanced problem as i have NO idea what to do anymore. Please please help me anyone that knows how to fix this

we have the same issue on two pc's, we put the true gaming pc back to xp late last night. hoping to find a fix, when the other fixes we will go back to win 7.

Both the machines have amd 64 processors, one is running an nvidia 7600 card o an ASUS K8N board, the other is running dual 9800gt on an ASUS A8N SLI-Premium board.

Also have have one more newer machine intel 3ghz on an ASUS P5KC with an 8800gtx, I am going to try this one this week.

On the two we upgraded, we did clean installs, tried over 10 different driver sets, everything worked fine, except in game play, and I am only talking about one game, Half Life 2 Death Match, the fps was as low as 10 and would barely get above 30, also the latency connection in game would say like 40, but on the actual stats it was 120, very weird. After putting the machine back to XP, fps was at 175 and latency/ping would be back at 35-40. We tried several servers, tried the setting on the lowest, it did not matter.

Also we tried it on a lan, when the ping should be 0-5, and the ping was 50...lol Usually pretty easy to trouble shoot things, but this one stumped us!!!

Any help would be greatly appreciated!!!!

same problem.

windows 7 64bit
2x evga 280gtx
evga 780 motherboard
tryed all drivers.
brand new hd with win 7

again for me xp on other hd gives me double the fps compared to windows 7 i can get constantly over 100+ fps on xp but now im lucky if i get that.

glad a few others are having same problems as i tryed everything to sort it.

I Have the same exact problem, I used to be able to run left 4 dead perfectly but after i switched over to windows 7 It went down to like 10 fps. I think windows 7 has a setting that is limiting the CPU.

Please post any updates i would like to fix this issue!!