it's running stable in windows but when i run P95, after about 4-5 minutes, the CPU frequency drops from 3.8 to 1.8ghz
i'm not sure why this is happening because i have all power saving options turned OFF in the bios and the temp on my core when the throttle starts is 68-71c
Also my settings in windows is set to high performance mode.
The heatsink you have is not enough.
overclocking a processor creates a lot more heat. the stock heatsink can not dissipate this amount of heat.
You need a better heatsink for overclocking your processor.