I've had just generally bad performance in SLI. I tried a bunch of stuff based on this and other posts:
- 32bit mode
- low priority for the app
- limited fps to 60 with gametime command (this actually made it much worse)
- windowed & borderless modes
- no VOIP
For me, the only fix was to disable SLI. I have 2 680s, and without SLI it plays super-smooth most of the time, even with settings on Ultra (minus MSAA since I use FXAA). With SLI, the in-game FPS monitor would show good FPS, but it just wasn't panning smoothly. As soon as I disabled SLI, the same section of the game was much more enjoyable.
Here's hoping they'll fix SLI and the other problems everyone's having.
My system:
Intel i7-3770 @ 3.4 GHz
Dual GTX 680s (latest driver - v331.65)
16GB ram @ 1600MHz
Win7 64bit (SP1)
Punkbuster manually updated
