CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 780 Dt/Mt/Sff Desktops - A69 at Amazon.com
SSD Upgrade for Dell Optiplex 780 Desktop 256GB/512GB/1TB/2TB | eBay
Install and boot from an NVMe SSD on a Dell OptiPlex 790 or 990
Dell Optiplex 780 to replace my parents old pentium powered Inspiron. All I added was RAM and an SSD, but it makes a great family PC. : r/SleepingOptiplex