Amazon.com: Computer 2nd HDD SSD Hard Drive Caddy for Dell Optiplex 790 780 990 7010 755 3020 960 7020 SFF Small Form Factor Desktop PC, SATA3 Second Solid State Disk Enclosure, DVD Optical Bay Replacement : Electronics
Install and boot from an NVMe SSD on a Dell OptiPlex 790 or 990
Refurbished - Dell OptiPlex 790, DT, Intel Core i5-2500 @ 3.30 GHz, 12GB DDR3, NEW 240GB SSD, DVD-RW, Wi-Fi, VGA to HDMI Adapter, NEW Keyboard + Mouse, Win10 Home 64 - Walmart.com
hard drive - Can I install a SSD of >= 256 GB on my Dell Optiplex 790 (Minitower)? - Super User
Refurbished: Dell Optiplex 790 Tower Computer Intel Core i7 2600 16GB 256GB SSD DVD Windows 10 Professional New Free Keyboard, Mouse,Power cord,WiFi Adapter - Newegg.com
Dell Optiplex 790 Desktop - Intel Core i5 2400 16GB DDR3 RAM, 128GB SSD and Windows 10 Professional - WiFi Ready - New 22 Inch LED Monitor (Renewed) : Electronics
DIY | Upgrading from HDD to SSD | Dell Optiplex 790 HTPC - YouTube