Full Details on Amazon.com : http://www.amazon.com/gp/product/B007MFGZ0A?tag=tsukuyomi-20
4GB Memory RAM for Dell Inspiron Desktop 620 620s 240pin PC3-10600 1333MHz DDR3 DIMM Memory
Brand new certified 240pin PC3-10600 1333MHz DDR3 DIMM Black Diamond Memory
Low density 4GB memory single stick memory module
100 compatible garrantee for Dell Inspiron Desktop 620
100 pre-tested on Dell system to ensure functionality
Lifetime warranty