Are all motherboards compatible with the mating pieces of other parts? Are all motherboards compatible with other parts? (Besides the CPU and fitting in with the case) Could I plug in any power supply to any motherboard? Are all of the outlets on the motherboard compatible with the mating piece of any GPU, cooler, RAM, or hard drive? I know that the sockets of CPUs don't match up with any kind of motherboard, but do the other components fit in to any motherboard?