To prove if its a heat issue or not you could run prime 95 and see if the CPU throttles down or not.
hi, i found something intresting today
i downloaded a MMORPG calles : ACE ONLINE but it works alright no clock going down and smooth gameplay so far
but when i go back to Battlefield the clock goes to 759 again i noticed when i get to 759 MHz the CPU stays that way for 1-10 min and then the GPU temp goes to 85-90 Celsius after the CPU pops back to normal the GPU gets back to 80 Celsius
please tell me what to do