Athlon cpu damage is a lot more common because their huge temperatures. Pentiums are of higher quality than Athlons and they run at lower temperatures. Plus if the cpu begins to overheat it will throttle itself back to produce less heat so it doesn't fry. Giving you enough time to shut down the computer when the alarm goes off. If an Athlon loses contact with the hsf, SIZZLE! You've got like 3 seconds before it fries. Damage also occurs alot when reattaching the hsf, some of those badboys are heavy suckers and don't have the best clips. Four corner screws are the best because it's not all supported by the cpu. On a lot of hsf's you can crush your core if you're not careful...and nobody likes a $400 paperweight. That's where shims come in handy, although they do increase temps a bit. You can also screw over your pci devices if your motherboard doesn't have a lock or seperate settings for the pci bus. That way you don't end up messing up your ethernet card by accidently setting the pci bus to 50mhz or something. Mine!