Hey guys, I was hoping someone could help me figure out whats wrong with my hd4890. Its an msi oc model. It will, fairly often, cause a weird effect on the screen. It appears to oscillate or shake up and down very rapidly, like a badly tuned old tv trying to pick up a station, then correct itself. Its getting annoying. It appears to only do this every time a new flash (or youtube) video is loaded, such as when I have a playlist running. I have done no overvolting of any kind and the fan is functioning well. From time to time the screen will also flash off, or to black, and back on, very quickly, its noticeable but only just. Is this a sign of my video card preparing to bite the dust or simply some driver or internal os issue Im looking at here? Thanks!