recently, i noticed that whenever i play any game, it runs good for about 3 - 4 mins, and then slows down severely, so i asked one of my friends who knows about computer hardware, i really don't know much myself. He told me to open the case and clean any dust in there, I did, but the result was..., nothing, it was all the same, i thought that i should check the CPU and gpu temps, so, I noticed that the graphics card runs at 35C - 43C idle and around 68C at full load, but the CPU is running at around 60C at idle and 99C at full load(i used prime95), so what do i need to do ?
Motherboard: Intel DH67BL
CPU: i5 2400
Graphics card: XFX HD 6850
Case : Cooler Master CM 310
Are you using the stock cooler? If you have replaced the cooler with an upgrade, check to see the fan direction is correct. Have you tried OCing? Make sure all cpu setting are defaulted in the bios. I would reset the bios to default values any way just to be sure. Is the cooler fan plugged into the correct header on the MB. There is a dedicated one for the cooler fan that needs to be used.
take out your heat sink and and fan then add thermal paste on it and then put all things back then i think it would be fine bcz i have 2500k and my idle temps are 40 and on load it goes bot more then 70