Hi
Up-date i put my 750w PS (xigmatek-mc751 750w) back in last night . I change how i had some of the lines plug into the PS (it modular cabling) and add a line to it to cut down on how much load
is on all the lines and now it running my rig stable at 2.81 like the 600w PS was .Rammateiner it
mite be worth a try if you got a spair PS to give it a try just to see what happens.