the only time having, say, 2x256 will be faster than having 1x512 is if you have an nforce board which uses "Twin-Bank Architecture" which can actively double your memory bandwidth (almost). no other chipsets have any feature that resembles this, though.
If it helps the ram in question is DDR400 (PC3200), personnally I agree with 2 sticks being faster than 1. But I was still looking for more technical arguments. Does the cpu access the slots sequentially or at the same time?
I bow to you Mr. 57 posts....obviously I can't read. I was just saying that one site had reviewed the new ASUS KT400 based board with some DDR 400 ram and it didn't perform as well as the DDR333 based system. I upgraded from a Athon 800 so this system IS fast for me, it will tide me over till hammer comes. So watch what you say bub. It was a matter of fact statement. I wasn't answering you question.