CMS 4GB (2X2GB) DDR2 5300 667MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex Gx620 Dt/Mt/Sff - A88 at Amazon.com
OFFTEK 1GB Replacement Memory RAM Upgrade for Dell OptiPlex GX620 Series (Desktop Mini-Tower and Small Form Factor) (DDR2-5300 - Non-ECC) Desktop Memory at Amazon.com
CMS 4GB (2X2GB) DDR2 5300 667MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex Gx620 Dt/Mt/Sff - A88 at Amazon.com
Dell Optiplex GX620 Desktop PC 500GB HDD Intel Pentium 4 Processor 4GB DDR2 Windows 7 Pro Nvidia GeForce 7100GS