Sorry to say so but your Katmai will hardly go above 112FSB because 600+ mhz is the limit for its 0.25micron core architecture....
To achieve this on your BE-6 which I owned for about 2 yrs, u must set the in the Softmenu bios page,
1. AGP/CPU multiplier to 2/3 if it's not this way and your Ultra will be working @74.6mhz in hapiness
2. Signal selector to High and maybe play a bit higher with its core voltage (only 0.10v maximum to keep your temps low and your cpu stable)
3. Do not worry for the PCI bus and devices, cuz it will be 1/3 of 112 by the mobo that is 37.3mhz which is absolutely safe.
4. Your RAM is always set by the mobo to 1/1 and your..... elcheapo PC100 won't have any problems working 12mhz higher (at least I hope so...).
P.S: Didn't know that this monster mobo can even fit 2 different kinds of RAM on it....:Q

