I just bought the ZALMAN 7000-Cu heatsink and placed it on my athlon64 cpu with artic zilver 5 as the thermal compund, but my cpu temp is constanly around 62 degrees cel. (at idle state!!!!!) why is my cpu running so hot. The Zalman is at full speed(around 2500rpms)...someone please help me. Any suggestions on why and how I can get the temps down will be greatly appreciated. Thanks in advance for the help.