I have a problem that ASUS techs don't have the answer to. When I turn on the computer I get 3 bangs from my Sony 2.1 speakers. Then they are ok. The worst problem is that the monitor screen flashes off and on. It can happen on any program. Examples would be an Office program or Quicken. The worst program is Civ V - my favorite game. I can go an hour with no flashes or stop counting at 65 flashes. Asus thought it was my Asus monitor so they exchanged it for a same replacement. Now they thought it was my motherboard so I just reinstalled a replacement Rampage IV Black today and it has the same problem. They had me pull and switch between two Asus 780Ti's, pull and switch the approved Skill memory, change settings in the Bios and update the Bios. The replacement board had series 4 Bios - same problem - now updated to series 7. No change. I can't believe my problem has never happened before. I have NOT reinstalled windows. Everything is as it was before with the new board. Is this a Windows issue or not related to Windows at all!!!!