I have a Sapphire Radeon X800 GTO with the r430 core with 16 pipes open. For some reason, it has been making strange clicking noises whenever I open up ATItool or try to play a game. When it makes the clicking noise, which sounds like the fan temporarily stopping, everything being displayed by the GPU (i.e. a game or ATItool's 3d view) freezes for a few seconds. What the heck is going on? It started this yesterday after about 2 weeks of perfection. It is the stock heatsink and fan...which I'm going to replace. Anyone have any clue just what could be doing this? My motherboard is an ASRock K7VT4A Pro and my CPU is an Athlon XP-m 2400+ at 2.33 GHz by the way.