8GB Kit (2 X 4GB) DDR3 Memory Upgrade for Dell OptiPlex 780 Small Form Factor Desktop PC PC3-12800 240 pin 1600MHz RAM (PARTS-QUICK Brand) at Amazon.com
Dell optiplex 780 - Dell Community
Dell Optiplex 780 SFF Desktop Intel Core 2 Duo 3 GHZ 16GB RAM 320GB HDD No OS | eBay