There are issues with the gpu in that model. It will overheat and burn off or cause other parts to decay fast like capacitors. The caps go as soon as you start seeing noise in the screen (ghosting, static in picture, hissing sound from the system that changes with picture movements like a window or mouse cursor) A replacement card is the only option if you do not know how to repair smd devices (surface mount devices on the board) The caps are the silver aluminum things. My guess is a design flaw in the heat sink or thermal compound.