[fowlplay4]

Check for a BIOS update for computer.

Also please provide the brand and model name of your computer.

Re-generate your dxdiag log for me so I can verify that you completed my suggestions above as well please.

Please be more descriptive as well "fps lag" doesn't help me very much at all. If possible record your computer using a camera/mobile phone and put it on YouTube so I can understand your problem better.