Did I read this you are running 3HD5770 cards on a 430watt PSU ??
yes, I have been playing games with this configuration and there were no problems.
approx: i3-530 (load) 110watt + hd5770 (load) 105watt + x (ssd cdrom...)
Have you updated to the latest bios? I noticed mine was terribly slow on boot sticking on the iNTEL screen and also screwed up DXVA i think as HDtv was breaking up after 10 mins of playing, i'd roll back/reinstall older bios!
I have installed every bios consecutively aside from 0035, that I skipped.
Currently I have bios 0036 installed.
I`ll try to reinstall older bios. Thanks for the hint.