Axiom 4GB DDR3-1333 ECC RDIMM for IBM # 44T1473, 44T1483, 44T1493, 49Y1435 - 4GB (1 x 4GB) - 1333MHz ECC - DDR3 SDRAM - 240-pin DIMM

No matter how heavy and numerous the applications that you are using, 1333 MHz memory speed with Registered signal will run them smoothly RDIMM 4 GB of memory to refine your computers performance 240-pin-pin DDR3 SDRAM 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