A-Tech 4GB Memory RAM for Dell OptiPlex 3020 - DDR3 1600MHz PC3-12800 Non ECC DIMM 1Rx8 1.5V - Single Desktop Upgrade Module (Replacement for SNP531R8C/4G) at Amazon.com
OFFTEK 1GB Replacement Memory RAM Upgrade for Dell OptiPlex 580 (Desktop) (DDR3-10600 - Non-ECC) Desktop Memory at Amazon.com
Restored Dell Optiplex 580 Desktop PC with AMD Athlon II X2 Processor, 4GB Memory, 250GB Hard Drive and Windows 10 Pro (Monitor Not Included) (Refurbished) - Walmart.com
Refurbished Κουτί Υπολογιστή | Back Market
OFFTEK 4GB Replacement Memory RAM Upgrade for Dell OptiPlex 580 (Desktop) (DDR3-10600 - Non-ECC) Desktop Memory at Amazon.com