Have you tried the card with Rise of Flight if you own it? I'm keen to know how the GTX 680 fares in this sim.
I'm on Z68 Sandy Bridge 2600K @ 4.8GHz here, my sig is a joke of course
But I've read even the GTX 680 2GB cant saturate PCI-e 2.0 bandwidth so I'm guessing I'll have no problems with my GTX 680 (that replaces a GTX 570 SC 1.3GB BTW) when it arrives on Monday.
Looking to the future, I'm not too sure if I should wait for Ivy Bridge or just go for a current Intel X79 socket 2011 platform that does have PCI-e 3.0 with an expensive but apparently very good six core i7- 3960X and jump to 16GB from my current 8GB ... I'm surprised to read that Ivy Bridge wont have a six core CPU after all and they might not be such good overclockers as expected? But I wouldn't be surprised if there was finally a six core Ivy Bridge CPU sometime down the line and mega expansive too.
But for sure once my GTX 680 arrives on Monday the next hardware purchases will be two more 28" LCD's ... I've been toying with triple screen for a long time and at one point even had two GTX 570's in SLI ready to do it, but decided against it and sold one 570.
I've read the 680 can do triple screens from the one card even with 2GB just fine.