MT51J256M32HF-80 MT51J256M32HF-80:A MT51J256M32HF-80:A TR MT51J256M32HF-80:B MT51J256M32HF-80:B TR MT51J256M32HF-80:BD9VVR MT51J256M32HF-80:BTR MT51K128M32HF-60 N:B MT51K128M32HF-60 N:B TR MT51K128M32HF-60 NB