Sometimes components just "die", I'm afraid.
And sometimes, the hard part is finding out which component it is.
I'm just suggesting the memory first because of the error and because it's easy to test.
How are your temps and voltages?
Download this small free program, speedfan, if you're not sure........
http://www.almico.com/sfdownload.php
Let us know the results, and the spec/model of your Super-Flower PSU.