Just got a Asus A7N8X-D, the board is laying on a glass tabletop and I've used several video cards and several peices of ram. I've tried the powersupply on a different computer as well. The problem is that the board shuts of power after several seconds. Has anyone had this problem before? I've also noticed that on the surface of my proc their is a perfect square. Its rough to the touch and again its a perfect square. Has anyone seen this before?