Patent ID: 7890687

Claim:
A motherboard, comprising: a plurality of slot groups each of which includes a first memory slot and a second memory slot, wherein the first memory slot has a plurality of first connection pins, the second memory slot has a plurality of second connection pins, and a second input pin of the second connection pins and a first input pin of the first connection pins receive a first voltage and a second voltage with different levels, respectively, to make the first memory slot and the second memory slot form two different access addresses; a bus connected with the first memory slot and the second memory slot of each of the slot groups; and an interface controller transmitting a plurality of pin control signals to the corresponding slot groups to make the two access addresses of the first memory slot and the second memory slot of a using slot group of the slot groups different from the two access addresses of the first memory slot and the second memory slot of each of the other slot groups, wherein the interface controller accesses the using slot group via the bus.