Is there pc2 6400 ram that will only work in AMD motherboards? I was shopping for more pc2 6400 240 pin DIMM ram and came across sellers who said theirs was only for AMD motherboards. Is there really a difference? That makes no sense to me. Comments welcomed in case you want to know my motherboard is a Nvidia 680i with an LGA 775 socket with an intel duo 2.2 processor.