A-TECH 4GB KIT (2 x 2GB) Dell Optiplex 210L 210Ln 330 740 745 745c 755 DT/MT / SFF 755 GX320 GX520 GX620 GX620 Ultra Small Form Factor DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory Genuine Brand 4GB KIT (2 x 2GB) DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Dell Optiplex. (See Compatibility List Below)