Chipsets change just as frequently between the two manufacturers (think P67 ->Z68 vs 890FX -> 990FX.) What Intel does do more than AMD is change sockets (think LGA775 -> LGA1156 vs. AM2+ -> AM3.) That means a new series of processor requires a new motherboard, instead of just dropping it in to an existing motherboard (as always assuming the motherboard supports it.) A AM3 board will support an AM2+ processor, but a LGA1156 board will not even physically fit, let alone support an LGA775 processor.