I seem to able to hit the same speeds with dimms 3 and 4 as I do with dimms 1 and 2. I was wondering if anyone else and experimented with this yet. What has been your max yeilds with both options? The reason I'm asking is because I'm about to get a XP-120 as I know I'll have to give up Dimm 1 and I don't want to be kicking myself in the A$$ later. Thanks.