I want to upgrade the stock CPU cooler that came with my Phenom 2 X6 1100T Black Edition Thuban? The stock one keeps the CPU from overheating but the cooler constantly speeds up and down in RPM and I'm thinking it's not keeping it cool enough to stay quiet. And I'm looking for a efficient and quiet CPU cooler to upgrade to but I have two problems. Where do I go to find out information on the stock cooler that came with the CPU? And what to look for when purchasing one. I'd imagine socket compatibility would be one and why do some coolers list individual CPUs under compatibility?