Originally posted by: the cobbler
You should ALWAYS use WinFlash. If the bios is wrong or your otherwise run into problems, WinFlash won't allow a bad flash. The Award Flash utility on the other hand will definitely allow a bad flash.
I would highly recommend flashing to v4.0 Bios and NOT the v5.0 if this is an existing build you are flashing. There have been problems with flashing to the newest bios on systems with single CPUs requiring everything from Windows repair installs to (me actually) having to call India to have Windows reactivated. That being said, few single-CPU users have flashed to this version and therefore nobody really knows how it OCs.
v4.0 includes all essential bug fixes and v5.0 will not offer any additional useful settings, etc. for a single-CPU machine.
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