CMS 4GB (2X2GB) DDR2 5300 667MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex Gx620 Dt/Mt/Sff - A88 at Amazon.com
512MB DDR2 Memory Upgrade for Dell OptiPlex GX620 (Ultra SFF) PC2-5300 Non-ECC DIMM RAM at Amazon.com
Refurbished Dell OptiPlex GX620 SFF Pentium D Dual-Core 3.00GHz 2GB...
OFFTEK 1GB Memoria RAM di ricambio per Dell OptiPlex GX620 Series (Desktop Mini-Tower and Small Form Factor) (DDR2-6400 - Non-ECC) Memoria Desktop : Amazon.it: Informatica
Dell OptiPlex GX620 Desktop PC Pentium D 3.2GHz Dual Core 1GB DVD
OFFTEK 1GB Memoria RAM di ricambio per Dell OptiPlex GX620 Series (Desktop Mini-Tower and Small Form Factor) (DDR2-6400 - Non-ECC) Memoria Desktop : Amazon.it: Informatica
Upgrading Ram in the Dell Optiplex Gx620 - YouTube
Dell OptiPlex GX620 specifications
DELL OPTIPLEX GX620 USFF PENTIUM D RAM 2GB HDD 160GB RS232 WINDOWS XP PRO