IBM RAM Module 8 GB (1 x 8 GB) DDR3 SDRAM 1333MHz DDR3-1333/PC3-10600 ECC Registered DIMM 8 (PC3 10600) Internal Memory 49Y1431 IBM 8GB (1x8GB, 2Rx4, 1.5V) PC3-10600 CL9 ECC DDR3 1333MHz VLP RDIMM - 8 GB (1 x 8 GB) - DDR3 SDRAM - 1333 MHz DDR3-1333/PC3-10600 - 1.50 V - ECC - Registered - 240-pin - DIMM IBM 8GB (1x8GB, 2Rx4, 1.5V) PC3-10600 CL9 ECC DDR3 1333MHz VLP RDIMM 8 GB (1 x 8 GB) - DDR3 SDRAM - 1333 MHz DDR3-1333/PC3-10600 - 1.50 V - ECC - Registered - 240-pin - DIMM