GTX 670 problems

[-ism]

Hello guys! I bought an MSI Gtx 670 power edition and at first it ran great. No problems that I was aware of. Random crashes in BF3 but I assumed that my overclock was causing that so I bumped up the voltage bit by bit until it stopped crashing. All was good for a few days. The same day it was supposedly running ok in BF3, but that night it crashed in Just Cause 2 after about 1 and a half hours of gameplay. This is where it got weird, I turned on my computer and the GPU spun up to max right away and did not do the twin frozr 4 backwards fan spin cycle. Just went on max fans. No VGA output from the card either. I expected it to be my ram or OC or something. Reset the CMOS to everything stock and even tried changing PCI slots no results. This randomly happens sometimes it turns on just fine and other times it just doesn't seem to want to work. (like now). Onboard VGA still works fine. I was using the latest nvidia drivers. I did OC the GPU to (+60)1300 MHz core and only +300 Memory but even backing that off didn't change a thing. It crashes now after 2 minutes of DayZ and before BF3 even loads it shuts off. Is my card faulty? I was so impressed at the overclock I got when I first plugged it in. Well I mean the stock boost to 1240 MHz. Should I return it to newegg I just got it last week. Thanks for all the help

[Brendan]

1300 is overdoing it pretty hard. I'm suprised you even managed to game on it that long, or you got an amazing bin.

[-ism]

Well stock it boosts to 1240 so 60 more cant hurt too much, right? Anyways I left it alone while I ate and now it is APPARENTLY working again. Gonna try and OC my CPU again and see if that changes anything. Hopefully not.

[Dim]

The card has a stock core speed of 1019MHz, and boosts to 1079MHz.

[-ism]

Oh... out of the box it went to 1240. Anyways I redid my CPU OC and now everything is running smoothly... for now... been playing a bit of DayZ but who knows. About to try BF3.