May i recommend Vigors Moonson 2 its very worth it droped my temps like 20c from stock cool im using a x2 4800 with one core activated and im running at 38c idle the only problem i had with this cooler is the fact u have to remove ur motherboard to install it.
thanks for the suggestion guys. Have sorted the problem and i'm now running much cooler, i think it was more a case of the poor thermal contact between the cpu and the cooler but i've put in the cooler from the below link reapplied paste and its working fine with no reboots or shutdowns at all. T
The temps were at least 50 at idle going up to 118 and shutdown before, but now idle temp is in the 20's and under a high load only gets up into the 40-50's
ok really annoyed now, haven't used the thing for a few weeks. but when i did after about 10 mins after startup i'm getting the slight glitch ( power dip) thing that the overheating problem started with. According to speedfan the "core" temp is getting up towards 60
round about 2900rpm on the cpu fan with nothing in the way. have got a fan blowinh into the case at the front and 2 fans blowing out of the case ( 1 at the side and one at the back) so i'd hope that it isn't an airflow problem