Just flashed the board to 0403 bios. When i´m trying to overclock either it wont start or it get suck at iniatilizing usb. Have tried 500x8 and 600x7 and memory at 1600 and 1800. Is there any special thing i have to change. Or is it dividerproblem ? Please give me sugestions how i may achieve theese clocks

System:

Rampage Extreme ( 0403 )
E8600
G.skill PC12800 HZ 2GB