any working fixes for nividia users?

[ATAG_Septic]

I run it fine (for me) on a 590 (or sometimes two). I'm using the latest beta drivers 304.79.

I believe limiting frames is the best answer for SLI. I don't actually believe there's any obvious improvement using SLI currently but it does work each processor less (~33% with four, ~70% with two) and the video ram is used up to 1.3gb per core out of 15gb. I have everything on maximum settings (not trees with current beta) both in game and in the driver profile and experience no troublesome stuttering.

I force alternate frame render 1
Limit fps to 30, which for me is fine when it's smooth.

I can't remember whether I put my specs in the sig here but if your friend wants my settings, he's welcome.

Septic