I have a Epox 9NPA+Ultra and have these options in the BIOS: CPU Spread Spectrum Options: Disabled, Center Spread. SATA Spread Spectrum Options: Disabled, Down Spread. PCIE Spread Spectrum Options: Disabled, Down Spread. On other boards whenever you "enable" this feature are you actually turning on "down spread" or "center spread" or does the Epox board use a different mode of modulation?
It depends on their implementation. Some motherboards actually allow you to manually control how much more/less.