Quote Originally Posted by InfinityG35 View Post
What are your max clocks on a the hx520? Because Im running into some PSU issues as well (at least I think). Anything over 4ghz is just unstable. But I want to make sure its the PSU before I buy something else.

Running a Zalman ZM-600HP with 4*16A rails and a GTX285. Prime/Memtest/Linx stable, yet Crysis/3dmark06 = instant crash.
Download the new OCCT and run the PSU test. It will run something along the lines of furmark and linpack. It will stress your psu far more than any other program and give you a nice graph of the bios reading of your 12v line.