CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 390 Ddr3 Dimm - A69 at Amazon.com
Install and boot from an NVMe SSD on a Dell OptiPlex 790 or 990
6d7tr Dell Optiplex 990 Minitower MT PC Motherboard 06D7TR for sale online | eBay
Optiplex 990 MT RAM compatibility - Dell Community
Install and boot from an NVMe SSD on a Dell OptiPlex 790 or 990
Dell Optiplex 990 MT - 2600, 1050Ti, 8GB RAM, Noctua Cooler, 700W PSU, SSD and HDD. I know cable management isn't the best, but the side panel isn't see through! Thermals are