OK, yes a new Power supply might have helped, but you really need to make certain that all of the new hardware, has all of their LATEST and GREATEST FIRMWARE imbedded. Also, you need to make certain that all of the new equipment MEETS REQUIREMENT's (or specification) of the Mother Board.
If you are not 100% certain how to check, go to your motherboards manufacturers website, and look for a system configurator for your motherboard. It will give a dashboard of all of the hooks your motherboard is capable of performing. You might even have to tweek some settings to make it stable. If you added more EQ, it could be more HEAT too, and not enough air flow! With a big 650W PS, you should be able to put a few more fans in there, see if that helps out!