KN8 Ultra Memory divider ??

[SIB]

Ive got the KN8 Ultra board to go with my AMD64 4000+ SD. I'm running Corsairs Twinx 3200c2pt RAM which is currenly running at an FSB 225 with everything in the BIOS set to "Auto".
I'd like to try and get the CPU FSB up to 250 giving me a nice 3ghz speed but i know the memory won't take it without a divder. Only problem is i can't seem to find one in the options anywhere !! . Am i just blind or does this board not allow that ?

 

[BUFF]

I'd like to try and get the CPU FSB up to 250 giving me a nice 3ghz speed but i know the memory won't take it without a divder. Only problem is i can't seem to find one in the options anywhere !! . Am i just blind or does this board not allow that ?

It's the DRAM clock setting in Advanced Chipset > RAM Configuration.
my understanding is that on auto the board should change it for you as you increase external clock but you will usually squeeze a bit more doing everything manually.