i just tested it and my gpu hit 89c. i was testing it with max payne 3 at 4K. My cpu temp was at like 43c but that's inaccurate so i would guess it was at 63 which is still below the max temps for my cpu plus i got a aftermarket cooler installed on it so I doubt the CPU is overheating.
This is my power supply.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817153165
I'm gonna remove the card and try it again to see how it fares.
Edit: The symptoms I'm having(Shutdown with no BSoD) seem to indicate a PSU problem. When it does shut down the PC isn't able to just turn right back on. I usually have to fiddle with all the plugs and devices attached to the computer. I also seem to have visual artifacts outside of games. Right now there's like this small square pixels that are flickering at the top of my screen.