Occasionally when my computer boots up there is no video, It has done this with & w/o a video card.
I5-3570K, Z77X -UD5 MB, 16GB G.Skill 1866 Ram, WIN 7 Ultimate 64. Some times I have to load optimized BIOS from memory because screen is blank and sometimes it comes back when I re-boot. I have tried the latest BIOS and earlier versions. I have another computer running an I7-2600k & the same MB and Ram and it is fine. Any suggestions?