AddOn 16GB DDR3 SDRAM Memory Module - 16 GB (1 x 16GB) - DDR3-1866/PC3-14900 DDR3 SDRAM - 1866 MHz Dual-rank Memory - CL13 - 1.50 V - ECC - Registered - 240-pin - DIMM - Lifetime Warranty

AddOn 16GB DDR3 SDRAM Memory Module - 16 GB (1 x 16GB) - DDR3-1866/PC3-14900 DDR3 SDRAM - 1866 MHz Dual-rank Memory - CL13 - 1.50 V - ECC - Registered - 240-pin - DIMM - Lifetime Warranty

AddOn 16GB DDR3 SDRAM Memory Module - 16 GB (1 x 16GB) - DDR3-1866/PC3-14900 DDR3 SDRAM - 1866 MHz Dual-rank Memory - CL13 - 1.50 V - ECC - Registered - 240-pin - DIMM - Lifetime Warranty