i am on f4n now, and for the last 2 hours ive been trying to get stable @ 4ghz and 4.1ghz with turbo on HT on, but i cant , i think it wants more voltage than what i needed for f4k,

also another thing i noticed,

cpu clock drive 700mv default on f4n
pci e clock drive 700mv default on f4n

on f4k cpu clock drive 800mv default
pci e clock drive 900mv

is there a reason for this ?
ive tried to change it to like the f4k was but still no good think it just wants more vcore and qpi/vtt v

i'll try for a bit more then im going back to f4k