Computer A has 2GB DDR2 667MHz only running at 333mhz according to cpu-z 2GB DDR2 800mhz only running at 400mhz according to cpu-z
Computer B has 2GB DDR3 1333mhz only running at 667mhz accordign to cpu-z 1GB DDR3 1333mhz only running at 667mhz according to cpu-z