I just replaced my faulty PSU, and I now have a 535W enermax power supply in place. Prior to changing the PSU, my system fans were spinning, but I could not get the system to post. Everything now boots fine, with the new PSU in place - so the problem was clearly PSU related.
However, now whenever I run a game, my system completely locks up. The sound card "stutters" the sound that was playing when the lockup happened, and the only way to get out of it is to power off the comp and reboot.
Does anyone have any suggestions as to why my computer is suddenly incapable of running any games? Solutions are very welcome.