I have a huge problem installing my new CPU. Firs off its an AMD Athlon 64 X 5000+, i am using my old heat sink from my old processor which does not have a fan on it since it uses my case fan which is directly behind it blowing at it. My problem is when I install the heat sink on the CPU using just a dab of AS5 and spreading it so its a thin layer over the CPU, and turn on my PC it idles at 50-55 degrees Celsius! I tried removing some but it still has the same temps. Idk what could be wrong? My new CPU did come with a fan+heatsink but I can use it because of dells crappy 5 pin fan connectors.