One of the reasons I say that, is because a lot of the new chipsets allow you to run your FSB and memory bus at different speeds. Even if you run at an FSB of 100MHz, you can still crank that memory up to 133Mhz and get better performance. Anyway, the Advanced Chipset Features page in the BIOS is where you would make even more memory tweaks to crank out that last bit of speed from your memory. The SA6R has a nice range of adjustments including the normal CAS2 or CAS3 settings. Basically, this setting determines how many clock ticks are used for each cycle of the memory.
Fewer clocks means faster access.
Provided your memory can handle it, that is. The other settings are pretty normal.