Dell PJ812 - Desktop Motherboard for OptiPlex GX620 SFF
Amazon.com: OFFTEK 2GB Replacement Memory RAM Upgrade for Dell OptiPlex GX620 Series (UltraSmall Form Factor) (DDR2-5300 - Non-ECC) Desktop Memory : מוצרי חשמל
How to change / Upgrade / Install / Remove a Processor / CPU in a Dell Optiplex GX520 GX620 - YouTube
Can I upgrade the Motherboard on my Optiplex GX620 to support a core processor? - Dell Community