Product Details
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AddOn 4GB DDR3 SDRAM Memory Module - 4 GB (1 x 4GB) - DDR3-1333/PC3-10666 DDR3 SDRAM - 1333 MHz - CL9 - 1.50 V - ECC - Registered - 240-pin - DIMM - Lifetime Warranty
IBM® 44T1599 Compatible Factory Original 4GB DDR3-1333MHz Registered ECC Dual Rank x8 1.5V 240-pin CL9 RDIMM