Advanced Clock Control [Press Enter]
CPU Clock Drive...........................: <<< 800
PCI Express Clock Drive.................: <<< 800
First enter bios and Load Optimized Defaults press F10 to save and exit.
It should be this.
Advanced Clock Control [Press Enter]
CPU Clock Drive...........................: <<< 800
PCI Express Clock Drive.................: <<< 900
Just setting it doesnt work you have to load optimized defaults. Renter bios and reset your settings for your overclock.

If you have tried going higher on other voltages you can try upping CPU PLL 1.6 Max.