Computer restarts during games, no BSOD

More and more often when I'm playing a game, my computer will freeze and shutdown without any error code whatsoever. I recently installed an SSD, and after that the problems seemed to show up. It doesn't make sense though, because no games are installed to the SSD. Just the OS.

If it's not the SSD, I suspect the Power Supply. It's a 730w RaidMax, and I've heard bad things about them, but not until after I got it. Like I said, I only get crashes/ freezes when I'm gaming. Any ideas?

EDIT: Okay, I have been playing and encountered more restarts. This time, with Afterburner enabled, so I can rule out any overheating. I really don't know what to do.

SOLVED!: http://www.reddit.com/r/techsupport/comments/145mpq/computer_restarts_during_games_no_bsod/c7ae3iz

Thank you Rethread!