The real impact for users is what CPU you have, since all but the FX's are LOCKED multiplier's on the upside, to get 300x10 results from 250Mhz ram you need to be able to set a x12 multiplier. If this is not posible, then your decisions is clear
or then you just use a mem divider of 12 at 300x10 and run the RAM at 250 2-2-2-5..

skate2snow, pretty much what I thought. Another reason why TCCD needs quite a bit more MHz in order to match VX/BH5.