the best strap is 333/800 it requires less volts for higher clocks
you gotta find the bios that likes you cpu lol but to be honest the newest bioses are crap
older bioses overclock better
and dfi gotta take its head out of their asses and support 45nm cpus properly on the x38-48
u boxed my x38 just cause it didnt play nice with my e8600
just saw the bios page use the ut602 or the lt 603 bioses they are the best