I was bored so I decided to maxed out my CPU. Well got to 3.9 and booted into Windows but not stable . I think it's my POS 350 psu that came with my case. If I got a better PSU(Fortron) with 500w then I can stay at 3.9 without the reboot . Right now I'm leaving it at 3.8 without any problem. I didn't run prime95 to test it yet though. Here is the snapshot.