I previously had GTX 570's in SLI and with the 690 I'm only getting about 10 FPS better in multiplayer.
I use MSI Afterburner and noticed that one of my GPU's isn't working at max capacity. It runs between 70 - 85%. I'm not even using DX11 in game because it makes it worse. No matter which driver version I'm using.
Can anyone else confirm their GTX 690 underperforms in Crysis 2? I'm starting to wish I had gone with 2 GTX 680's and SLI'd them myself.