<< 10x120 if you have a kt133 chipset(or any other 200mhz mother board)
9x133 if u have a kt133a chipset(or any other 266mhz mother board)
allthough I have heard if chipsets like the kt133e running 266 allthough they are spossed to run 200mhz >>
The KT133E will do up to about 137mhz or so just fine. HOWEVER, the KT133 orignal chip will almost never go over 110 bus stabily, so 10x120 isn't really an option on that one.