Axiom 8GB DDR3-1066 ECC RDIMM for IBM # 46C7476, 46C7482 - 8 GB (1 x 8 GB) - DDR3 SDRAM - 1066 MHz DDR3-1066/PC3-8500 - ECC - Registered - 240-pin - DIMM

1066 MHz of memory speed with Registered signal makes your computer great at multitasking RDIMM 8 GB of memory to heighten your computers performance 240-pin-pin DDR3-1066/PC3-8500 operates at an effective bus speed with minimal power consumption and as a result, you get optimal computer performance with an improved memory heat dissipation