I recently upgraded to SLI (2 680 GTX's). This might seem like overkill but I like to play with full settings including increased uGrids etc - when you add 3D on top of that even a 680 GTX starts to struggle.

Anyway, after saving up and buying the second card I find that 3D Vision and 680 SLI (in Skyrim) are having some serious problems.


Framerates;

2D and 680 - 45fps
2D and 680SLI - 70fps

3D and 680 - 25fps
3D and 680SLI - 20fps!


As you can see there's a nice improvement in the 2D performance, but I bought this second card expecting the 3D Vision framerate to go up to 40ish (and make it playable) - instead it has gone down.

So something clearly isn't right, and it is something to do with Skyrim because in my other games the 3D Vision framerates have increased when using SLI.

Has anyone had this problem and fixed it? I know 3D Vision and SLI is quite a rare setup (plus I don't know if it's only regarding 680 SLI or SLI in general) but i'm really hoping someone can help.

I should say this is with a fresh install of Skyrim, updated through Steam and i'm using the latest NVIDIA 310.70 drivers. I've tried changing some SLI settings in Inspector but nothing has helped. Also I have tried the game with and without the Helix Skyrim 3D Vision fixes - the problem is the same either way.

Thanks for any advice!

Just in case anyone has the same problem - I fixed this issue by simply deleted NVIDIA's Skyrim profile from NVIDIA Inspector. Not sure which setting it was (specifically) but something they had put in there was causing a problem with the SLI/3D Vision combination. Once I deleted the profile my 3D fps went up to 52, and the game still looked perfect due to the Helix mod.

I've since created my own Skyrim profile just for the settings I normally use.