There wasn't actually a need for a new chipset when AM2 came along. AMD implements a dual-channel memory controller on the CPU, rather than the northbridge. Thus, when AMD made the switch to DDR2, technically, all that was required was a motherboard with a new socket, new RAM modules, and the supporting circuitry; with nForce 4 and friends, in theory at least, able to carry on through the change.



Link: Hexus