Thanking anyone in advance. Here is my question. I have a heatsink and fan from a Athlon X2 3800. I want to know if it will work with a Athlon X2 4400 without overheating problems. I couldn't find the info on the AMD website (very confusing). I have been trying to buy a retail X2 4400 but have only found the OEM CPU. I run a 939 socket and want to keep it for a couple more years.