4GB Memory for Dell Optiplex 580 780 DT/MT/SFF PC3-10600 Desktop RAM (PARTS-QUICK Brand) 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