I have an Ati Sapphire HD4670 1024mb. Its default clocks are at 750 / 873. I clocked it 770 / 923 which isnt a lot. I left the fan on auto and when I browse the internet the fan spins up spins down. (Depending if im scrolling a a page and etc.) I'm not doing anything big like videos and stuff. I open my temps and it's at 90-94! So I into CCC and put fan to 100% the temp dropped down to 48C.. So then I put the fan back to auto, continued surfing, and it stayed there.. Any ideas why it does this? It can do it up to twice or even 3 times a day. I'm getting worried.