I have a 2005 desktop PC that started overheating and shutting down, especially when playing older games. My CPU went as high as 104 C, its fan at 4900 RPM, and system fan 2740 RPM. After doing some research and opening up my PC I found that I may need a new fan/heatsink. However by chance I stumbled upon a forum post saying to try thermal paste BEFORE investing in a new fan/heatsink. I checked my current fan/heatsink again and saw that there was a big hole in the middle of where the original thermal paste was, which explained why it kept overheating. I chose the Antec paste over Dynex (only two sold in Best Buy stores) because Antec made my computer's year-old 600 W power supply and I figured they would know what they are doing when it comes to thermal pastes. $15 is not a lot of money compared to $70-$110 heatsinks Best Buy have available. The paste was a bit hard and didn't spread very easily over the processor cover compared to all the how-tos I read before installing (I had to, there was zero instruction). After putting the heatsink back on a few times and using Q-Tips to wipe off excess amount around the edges I completed the installation and fired up the computer. Temperature - was 104 C, now 60 C CPU Fan - was 4900 RPM, now 1570 RPM System Fan - was 2470 RPM, now 880 RPM The results pleasantly surprised me. More than 60% reduction in fan usage and 45 C drop in temperature - I was hoping for only 20 C at best! I'm sure your mileage might vary but this paste indeed works. I have done a few intensive things with my computer the last few days and played the games that caused my computer to overheat. So far so good, no surprise shutdowns. If ever I need more cooling in the future I'll invest in a better heatsink and use this thermal paste again. For now I'm very happy with the cheap fix and recommend anyone experiencing overheating to try a thermal paste like this one first.