Dell Optiplex 7040 Upgrade Video Card RAM CPU SSD - YouTube
Upgrading Dell Optiplex 7040 with more of the same 4GB RAM? : r/PcBuild
Dell OptiPlex 7040 SFF Intel Core i5-6500 3.2GHz up to 3.6GHz 8GB 500GB SSD Win 10 Pro
CMS 32GB (2X16GB) DDR4 19200 2400MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® OptiPlex 7040 SFF, OptiPlex 7050 SFF/Tower - C114 at Amazon.com
Optiplex 7040 SSF GPU - Dell Community
Here's my Dell Optiplex 7040, started life as an i5 6400 Inspiron 3650. Slowly upgraded piece by piece to what it is today. It's sporting an i7 6700, GTX 1650 Super, 32