Thanks for the advice, but not really looking to drop $180 on a video card. This is for my office rig, so I don't need video performance...just peace and quiet! I am looking at the 7850 for my next gaming rig however.
@unksol: I didn't think about that. I'll take a look inside and see how easy it would be to disassemble.
FYI the Radeon 4850 was introduced in June of 2008. It's rated at 1000 gigaflops even, which is surprising for how old it is. That puts it smack between a Radeon 7750 and 7770.
But if it's just an office computer and you never game with it, cut the power wire to the noisy fan. It has a second fan so it won't overheat as it's basically just idle surfing the web or playing video. You can download MSI afterburner and monitor its temperature, afterburner can put a two digit temp icon in your taskbar.