My original temperature for my athlon xp 2800 was 140's Farenheit and after applying Arctic Silver 5, I monitored the temperature and it stayed at the low 100's max was 102 . I think it also helped with performance because 3dmark2003 was always around 5350ish and I just ran another test right after the arctic silver and it ran up to 5390. Its not much but hey its cool to see it jump a few points. The only tough part was getting the stupid heatsink off and putting it back on (Its the one where you have to use a flat head screwdriver and if you are not careful enough, u might just slip and damage your motherboard. I had a 3 close calls shoving the screwdriver onto the motherboard) but other than that, I'm a happy camper.