FX-8350 OverClock High Temperature

[Bubllepie]

FX-8350 OverClocked 215MHzx21 1.35v

CPU Cooler, Thermalright HR-22
CPU Grease, JunPus JP-DX1
CPU Cooler Blowing Fan, Enermax TwisterStorm / UCTS12A (Overclocking Mode)

prime95 FFT size, between 2048K and 4096K.

Temperature, 70c Over.
downclocked.

why?

PC Info
---------------
CPU:FX-8350 (Paper box Lot)
MB:ASUS M5A97 PRO
Front:SilverStone Air Penetrator SST-AP141
Rearhanteks PH-F140HP
Side:120mm silent Fan
Case:Carbide 300R

thanks,