ATI Radeon 8500 replacement fan

If the small fan is situated flush within the heat sink that's glued to the GPU (as shown in this eBay listing), it isn't available at the retail level. If you do a web search, you'll find aftermarket graphics card cooling fans and may be able to make something work. Unfortunately, ATI glued its heat sink w/fan on the early Radeon cards, and didn't use a removable heat sink w/fan that attaches to the PCB with two spring-loaded posts (as found on many other cards). This creates a problem when the fan gets obnoxiously noisy or stops spinning completely. If you've got a noisy or sluggish fan, you can remove it from the heat sink, using a small (#0) phillips screwdriver, but be careful not to strip the screw heads. On the back of the fan, there is a plastic sticker that covers the fan's shaft. This isn't the outer side with the white sticker and red "ATI" logo. Anyway, peel back that sticker and drip some fine lubricant across the end of the shaft, as you manually turn the fan blade. You can even use a small straw and place it directly on top of that area, hold it securely, and then blow into it. A concentrated blast of air may force the lubricant past the shaft seal, so that it reaches the sleeve bearing. After letting it sit upside down for a while, you can reapply the seal (or replace it with a small piece of electrical tape) and reinstall the fan within the heat sink. Hopefully, it will run better than before. Recently, I had to do this to a Radeon 9250's fan that was both noisy and speeding up/slowing down as it ran. Now, it runs quietly and at a constant speed. On an original Radeon All-In-Wonder (PC), I removed the noisy fan and heat sink and replaced it with a passive heat sink (as an experiment). It hasn't produced any video anomalies or other symptoms, so the GPU probably isn't overheating. On a newer card that runs hotter, the fan is a must.