thanks for ur reply.
im already using the performance power plan and in the advance settings, processor power management i only have the option for cooling. no min/ max processor state. i dont think that option has been there since i upgraded from my athlon II x4 640.
i read that if i enabled cool n quiet again then this option would apear again but it does'nt.
it does'nt clock down when system has been idle for a short while. its when its been idle for hours. it hasnt done it yet today and pc has been idle for a good few hours