For Desktop Dell Optiplex 3046 SFF Socket Motherboard
Dell OptiPlex 3020 specifications
Dell OptiPlex 3020–Mini Tower Owner's Manual
Refurbished) Dell Optiplex 3020 Mini PC (Core I3 4th gen, 8GB RAM, 500 GB HDD, Windows 10 Pro, MS Office|Intel HD Graphics|USB, Ethernet,VGA|PAN India Warranty), Black : Amazon.in: Computers & Accessories
Dell OptiPlex 3020 Mini-Tower Overview... Should You Buy? - YouTube