New patch completely destroyed my game performance

[cyborg34572]

I only used to get micro-stuttering here and there before the patch today, was still very much playable, now after the new patch my game is literally completely unplayable, framerates dropping as low as 30fps (cant even reach 60Fps now. With the kind of hardware i have, not being able to hold steady 60Fps is completely unacceptable) with heavy stuttering in every turn, every direction. Im pretty pissed about this, anyone have any idea how to fix this or having the same problem?

My specs
i72600k @ 4.5Ghz
8GB G.Skill Ripjaws x Series DDR3-2133MHz
3x GTX580's in Sli (EVGA Sc's, stock clocks)
Drivers: 301.42 WHQL
Windows 7 Ultimate 64-bit

But yeah your new patch broke my game.
If any dev answers this though, do not tell me its an SLI issue, i have tried playing the game with single GPU, still same problem.
Do not tell me its overclocking issue, i already have tried playing the game in default clocks, still same thing.
Do not tell me its because i have HT enabled, i already tried On and Off.

Fact is, before this new patch my game was very playable, steady 60Fps with some stuttering here and there, stuttering that didn't really drop my framerate at all, but point is the game was perfectly playable. Now after this new patch my performance is !!!