So, the for Christmas I recieved a GTX 660 (non TI) and I put it in my computer christmas morning and had it running for a little bit, then while testing it out with some Planetside 2, my computer shut off all of a sudden. Since then I have not been able to get my computer to stay on past the windows login screen and more recently at all. So I had thought that my crappy 575w Logysis PSU had finnaly given under the new load of the 660, So I went out and bought a new 600w Thermaltake PSU and put that in my computer. I have only been able to get into windows once with no graphics card in it. Then I tried it with the card in and it got just past the BIOS splash screen and locked up. The next time it locked up on the splash screen, then it locked up halfway through loading the splash screen. By that time I figured I had better clear the CMOS to make sure there wasn't any old settings messing it up, and since then I have not been able to get it to POST or anything, all the happens when the power button is pressed is the lights and fans come on, and thats it. I am at this point thinking that my old PSU took my motherboard to the grave with it and just wanted a second opinion before I went out and bought a new mobo now too. Thanks for the help!
System specs:
ASRock 880gm-le Motherboard
8gb DDR3 1333 RAM
AMD Phenom II 840 @ 3.4Ghz
500GB Seagate Momentus XT (boot drive)
1TB Western Digital(?) storage drive
and before the 660 I had a GTX 550Ti