Whenever a transparent shade of black is present on my monitor, a grid formed by the pixels on the monitor form and begin to vibrate. It does this only when there is a dark transparency over an underlying image. It happens whether I'm in-game or on a website. Monitor is a samsung s23b550 and gpu is a gtx 560 oc'ed to 930. Same thing happens at lower clocks. I don't believe it's the monitors fault but who knows. Drivers are all updated. If anyone can shed some light on what's going on it'd be great. I can explain further if needed.