Hello new to the forums here but I am desperate for help. I recently purchased an HiS Radeon HD6870 Model Number H687F1G2M and it worked fine for about a month. Now anytime I watch any type of video whether it be avi,mpeg youtube or whatever my desktops icons start flashing repeatedly along with any windows I may have open. If I click on the tol bar, the blinking stops until I click on the desktop or any open window. Does anyone know what may be causing this? I have an asus crosshair 3 mobo with 8 gigs of OCZ AMD Black Edition Ram AMD Phenom2 x2 550 cpu OCZ ModXStream Pro 700W Modular High Performance Power Supply compatible with Intel Sandybridge Core i3 i5 i7 and AMD Phenom with an Enzotech Extreme-X Rev.A 120mm 2 Ball CPU Cooler. Any help is greatly appreciated.