Dell D6H9T OptiPlex 990 SFF Motherboard | Laptech The IT Store.
Dell Optiplex 990 Desktop PC- 2nd Gen 3.1 GHz Intel Quad Core i5, 8GB-24GB RAM, Hard Drive or Solid State Drive, Win 10 PRO
How to add RAM on Dell OptiPlex 990 SFF - YouTube
Refurbished: Dell OptiPlex 990 SFF Desktop PC Computer Intel Core i5 2400 8GB RAM 256GB SSD DVD Windows 10 Professional New Free keyboard,mouse,powercord,WiFi-Adapter - Newegg.com
Dell OptiPlex 990 Ultra Small Form Factor Desktop Computer PC, 3.2 GHz Intel i5 Quad Core Gen 2, 16GB DDR3 RAM, 480SSD Hard Drive, Windows 11 Professional 64 bit (Used) (Monitor Not Included) - Walmart.com
Dell Optiplex 990 Desktop PC- 2nd Gen 3.1 GHz Intel Quad Core i5, 8GB-24GB RAM, Hard Drive or Solid State Drive, Win 10 PRO