Solved: Optiplex 9020 4770-i7 Mini Tower Case Transplant to Larger ATX Full Tower Case - Dell Community
CMS 16GB (2X8GB) DDR3 12800 1600MHz Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 9020 Mt, 9020 Sff, 9020 Usff Desktop - A63 at Amazon.com
Dell Optiplex 9020 Small Form Business Desktop Tower PC (Intel Quad Core i7 4770, 16 GB Ram, 240 GB Brand New SSD, WIFI, DVD-RW, WIFI, Windows 10 Pro - Walmart.com
Ram upgrade for D07S (optiplex 9020) - Dell Community
How to Add RAM on DELL OptiPlex 9020 SFF - YouTube