Originally Posted by Vestito
Just back up your stuff and re-install windows, or go into the nvidia folders and try to delete all the drivers and new install of the latest versions, but re installing windows would be much easier
First off, the nVidia folder in Program Files is not where your drivers live. They live in Windows/System32. Secondly, manually deleting that folder is definitely not something you'd ever want to do. And thirdly, dude has already done a safe-mode driver sweep/reinstall, which was the actual proper way to reinstall drivers if you're having (what are likely to be) driver issues. Although unfortunately, sometimes tools like Driver-Sweeper create more problems then they solve.
At OP: As was mentioned above, I know it's late now, but you should try to never store 'stuff that you care about' on the same partition as Windows. It's best to have a second, totally separate 'storage' drive and keep everything you really care about there. But at the very least, you always should make a 2nd partition for your this 'permanent' storage. That way if you ever have to scorch the earth and re-install Windows, you won't lose critical stuff.
Although it required a fair bit of trickery to accomplish (and help from the interwebs) when I installed Windows last, I actually managed to put my entire Users folder on a 2nd HD, so I TRULY have nothing I care about on my C:/ drive ... but that's taking it to a bit of an extreme
As you may be deducing, what I'm getting at here is that I agree w/the idea, at this point, of at least trying a fresh Windows install. HD's are so cheap nowadays, you could go grab an extra one and throw Window's on it, just to see if that fixes it.
If it works, you've already got your 'storage' drive in the form of your current HD ... just delete the Windows partition from your current drive after you install Windows on a new drive, and you're done. Word of advice though if you do this, leave your current HD totally disconnected throughout the entire Windows installation on the new HD, and THEN plug it in afterwards. There's all sorts of reasons why it makes sense to do this, but the most important one is that you guard against accidentally nuking your existing data during the windows install process.
If you absolutely cannot do the new HD/new Windows route for whatever reason, other things to check are:
1) As mentioned, make sure (using the Afterburner graphing or on-screen display features) that your GPU's are properly clocking up to full power 3d clocks when gaming (think it's around 750 on the Hawks iirc).
2) Confirm that each card is running PCI-Ex 2.0 at 8x or 16x using GPU-Z. Because windows 7 has power-saving on the PCI-Ex slots, you should run some benchmark in a window when you check the reading. Furmark/Kombustor or Heaven work well for this
3) If your NOT at 8x or more, check your BIOS to make sure there's nothing forcing any slot to 1x or something like that.
But all things considered, if you're having no problem w/perf in DX9 but you do in DX10/11, I have to think that it's problem w/Windows that you're unlikely to be able to 'fix' w/o a fresh install, esp. since you've already tried re-installing DirectX.Edited by brettjv - 10/30/11 at 2:50pm