Dell 4GB DDR3 SDRAM Memory Module. 4GB 1600MHZ NON-ECC DDR3 SDRAM 240PIN UBDIMM F/OPTI 3010 7010 9010. 4 GB (1 x 4 GB) - DDR3 SDRAM - 1600 MHz DDR3-1600/PC3-12800 - Non-ECC - Unbuffered - 240-pin DIMM 1x Dell 4GB DDR3-1600 PC3-12800 240-Pin UDIMM 1.5v Dual Rank (2Rx8) Non-ECC Unbuffered Compatible with Dell models Optiplex 3010 7010 9010