Its very simple, some would find acc easier, but alot of overclockers are bios overclockers, etc they like to play in the bios. The advantage of this is you can hold in the bios/dos and run memtest and find stable settings before going into windows blue screening and hosing an OS install.

Me personally I'm a bios overclocker......the only time I have ever used a windows OCing utility was to break the x2 3800 CPUz WR because I was having cold boot/cold bug issues.

SOF just out of curiosity did you have FUSION installed for any of the benches or did you optimize manually or are these all just unoptimzed runs.