4 x 4 GB PC12800 DDR3 1600MHz 240 Pin UDIMM Taken from a working DELL XPS 8700 with an I7 4770 in it. MT8JTf51264AZ-1G6E1 Capacity 4GB Memory Type DDR3 ECC Non-ECC DIMM Type UDIMM Rank 1Rx8 Speed 1600 Voltage 1.5V
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