I bought the monitor back in Dec. '07. I also replaced the video card around the same time. I installed an 8X AGP, 256Mb nVidia geForce card. I'm not sure if it's the monitor or the video card that's causing the screen refresh. I never noticed the screen refreshing near as much with my old Viewsonic CRT monitor and 64 Mb nVidia geForce card. When I load a game like Pocket Tanks, the Samsung monitor goes dark, then it comes back, goes dark again, comes back, etc., etc. Can someone explain why this is happening?