Is my power supply failing? Starting a few days ago, here's what's been happening. In order.
1) Games aren't running nearly as well as they should. At first Left 4 Dead was running probably at half the framerate it normally runs at. And then today when I tried to play Counter-Strike, the framerate was in the 20s.
2) The computer has began to turn off randomly. If I boot into safe mode, it turns off every time before I can do anything.
3) I tried to play Left 4 Dead a few minutes ago. Framerate was in the teens, and then my computer turned off. I reboot and screen "fizzles" when I boot into Windows (assuming when it's opening the NVIDIA processes, because they aren't on like they normally are).
I turned off my computer, unplugged everything, and then plugged back in only the power cable. I could hear a faint "zzzz" soud. Very faint, but I could hear it.
If I boot into my Vista side, it'll give me a blue screen, start some memory dump, and turn off.