Check the complete AA number against the list I gave you. This is what I mean by "it won"t even try to boot"!Hi all. I got my P4 ready with BIOS update, switched to a 3.4 E , and No video after numerous boots. Good power to board, video card @ 12.5 VDC any ideas? before I switch back? any chance of permanent damage? (was running a 2.4/800 P4) thanks all