I have the same configeration, and due to an overheating problem, I checked the Fans (OK) then cleaned out the heatsink (Aboue the processor) which had quite a bit of dust in it. problem Cured.
have you checked the fan (spinning freely and clean) Is the power line to all fans in firmly Is the heatsink clean Is the machine overclocked, if so try reducing the overclocking slightly
Download and run SIW.exe This is a windows systems software program. Go accross the top to Hardware then down to Sensors, and monitor the settings and especially the fan speeds and temperatures for any fluctuations. Terry
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