AMD A10-5800K : Won't Overclock past 4 GHz with Hyper TX3?

Hi,

I have an AMD A10-5800K APU, and I am using a Cooler Master TX3 cooler.

I used the AMD Overdrive Auto-Tune feature, and my processor will overclock to 4.1 GHz and get halfway through and then freeze or reboot.

I monitored the Thermal Margin temperatures, and the hottest it got, the Thermal Margin was 25 C.

If it means anything, I have had one or two Html or java or something "Exception" windows show up on my desktop after gaming.

I'd really appreciate any help! Thank you.