At the moment I am running of a: DELL OptiPlex 3050, Intel Core i5-7500T 2,70GHz, 16GB RAM, 256GB SSD, Intel HD-Grafics 630, Win10
Problem here is, it is a micro form factor and can’t hold 3.5" drives. So the HDD is a Seagate 8 TB USB 3.0 drive connected to the system. But it serves multiple HD Streams and 4k to my LG 4k TV (direct play) if required.