How to force the EFI calculated FSB value?

[NIXin]

Hi all,
This was also a problem on 10.5.7 - my FSB value calculated by EFI is wrong. How can I force it to send a correct value?
Because of this, VoodooPower also calculates wrong P-states.
Tried injecting FSB into smbios.plist but that doesn't do anything, unfortunately.

What's strange, is that right now it says my Bus Speed is 13GHz and Rated FSB is 55GHz (while the multiplier is 0.0x).
But the clock is working correctly.

I have no clue how to force the correct value for FSB, which is 200MHz.