Mouse lag - games also...!

My mouse lags, I think it does it on the desktop (not sure), but in games it easy to see. I set my max fps to 100 and then it lags when I move mouse around, but when I have 400 fps it doesn't lag! I have tried another mouse, updating all drivers (chipset, mb, GPU, mouse).. Don't know what to do?

CPU: AMD 64 x2 4200+
MB: A8N-SLI SE
GPU: Asus Geforce 7600GT
2 GB kingston PC3200 Ram

could be a weird driver issue or specific program doing it to ya. adware / spyware. usb 1 or 2?

Are you using a USB mouse or PS2? A USB Mouse needs to share resources with other USB devices which will cause the Mouse to slow down a lot.

If your using a USB mouse, get an PS2 adapter so the mouse has its own interrupt to work with.

You can try to go to the Nvidia display settings, on the left menu, under "Performance & Quality Settings" -> "Additional Direct3D Settings" and adjust max frames to render ahead. Lowering it to 0 or 1 might help, depending on the game. For example, Oblivion has a severe mouse lag if you have this option set at default (3).

If you don't see the "Additional Direct3D Settings", you'll need to download CoolBits:

http://www.softpedia.com/get/Tweak [...] -Reg.shtml

So far, this sugestion worked best for me. I moved the wireless connector on my logitech from the back of the case to the front-mouted USB ports and I get much better response!