AddOn 4GB DDR3 SDRAM Memory Module - 4 GB DDR3 SDRAM - 1066 MHz - CL17 - 1.50 V - ECC - Registered - 240-pin - RDIMM - Lifetime Warranty

Oracle-Sun® X4651A Compatible Factory Original 4GB DDR3-1066MHz Registered ECC Dual Rank x4 1.5V 240-pin CL17 RDIMM