Full Details from Amazon.com : http://www.amazon.com/gp/product/B007SY15Z0?tag=onigi-20
4GB Kit 2 X 2GB DDR2 Memory for Dell Optiplex 755 760 GX280 Ultra Small Form Factor Desktop
Speed PC2 6400 800MHz
Form Factor 240 pin DIMM
Capacity 4GB Kit 2 x 2GB
Warranty Lifetime
