drivers updated....what the hell! Seems like alotta of people are in my boat. V sync on or off it jumps from 100fps down to 20, im super pissed. drivers are up to date.

Join the club. Happening to everyone.

i5-2500
12GB
GTX 570 1.25GB averagin 40 and has plummeted to 20 before...

i7 3820
16 gb Ram
GTX 670 2way SLI 314.07
framerate drop in campaing from 74 to 15-25,high settings, FXAA ,v-sync off
mention that multiplayer DON'T have this problem works great
SEAMS THAT SLI SETUP IT WILL ALWAYS BE A PROBLEM ...

Try the new Titan driver with a modded .inf
i made a thread here yesterday, it's the latest driver from nvidia and the best for C3.
use the CVar configurator to tweak settings and try set a framerate limit of 60. in-game v sync off, adaptive v sync enabled.

Same here, my fps jumping like I got a 10 year old PC 40-65 fps ALL ON LOW!!! Like WTF? I run BF3 on hight/ultra at 80-120 fps.....

i5 2500k
gtx 680
8gb dd3