PSU Issue (fixed)
Got my EVGA 280 a couple of days ago. I had a weird problem. 2D was fine but as soon as I tried to play a game, I could play for a very short period and then the monitor would lose signal to the vid card. Vid card fan would completely stop spinning. I could reboot and everything was ok until I tried to play a game again. I had the Antec 550 watt Neo HE and I thought it was up to the task (it ran my 8800GTX fine). I started posting in forums and some thought it was a weak PSU and some thought I got a bad vid card. I was really tripping out.
Then I said hell with it and bought a Corsair TX750w PSU (with single 60 amp 12v rail) to rule in or out the power supply. I fired up Mass Effect with it and played for over 1 1/2 hours with no loss of signal to monitor at all. It was the longest I have been able to play a game since I got the vid card (longest up to then was around 5 minutes, and the card was not overheating).
Looks now like the Antec 550 just couldn't handle this card. My first experience with a PSU that couldn't cut the mustard.
I7 3770 @ 4.4 gig (Noctua NH-U14S Heatsink), ASRock Z77 Extreme6, 16 Gigs (2x8) Corsair Vengeance DDR3 1600, EVGA GTX 680 Signature 2, Acer P236H 23" (1920x1080), X-Fi Xtreme Gamer Pro, 2 WD 640 gig SATA HDDs, WD 750 gig HDD (eSata), WD 1TB Black HDD, Sandisk 32 GB ReadyCache SSD, 2 SATA DVD Burners, Logitech Z-5500 5.1 Speaker System, Corsair TX750w PSU, HSPC Top Deck Tech Station, Windows 7 Pro x64