HI, My m.Board supports dual channel DDR, but the manual is a bit vague... I understand that a complimentary card in channel B will double the bandwidth, but will this also double the RAM? or is this only if both are in channel A. The way I picture it - and I may be way off - is the 2 slots of channel A, or B are connected in serial, whereas the channels THEMSELVES are parallel. I hope that I explained that clearly???!!!??? Thanks in advance, STEVE. " A little knowledge is a dangerous thing " SOMEONE Famous???