Received my 680 on Tuesday- been running it through tests and games since. Upgraded from an old 295 which was coupled with a Matrox TH2G. Far as performance the thing is a beast- it's enough to run Skyrim (with a plethora of graphic mods including the texture pack) on ultra and doesn't break a sweat. It also runs cooler and is a lot quieter. Granted, I'm still only packing 5040x1050.
I did run into some issues however with trying to use nVidia 2D Surround. For some reason the recognized resolution only yields ~4300x900 instead of the full 5040x1050 with Surround enabled. Using the Matrox still yields the correct resolution so I've been using this as a temporary workaround while I work with EVGA support. Attempting to set up a custom resolution errors out with an unsupported message. At this point I tend to think it may be driver related as this used to happen a fair bit when I first picked up the Matrox. On the other hand, it may be display related too... I'm using 2x DVI and a DVI-DP dongle. I'd like to move in the direction of getting Surround working, particularly in favor of the Witcher 2 Enhanced.
Anyone else dealt with something like this yet?
nVidia Surround works fine via DVI+DVI+HDMI if you get an HDMI->DVI cable. That's what I'm running ATM and avoids the need for DisPort. That might help, who knows?
I've done some testing, but mostly I've been busy (at work) or busy gaming. :D