Are you on 110 volt power or 220 volt power?
In typical US home, each of those need to be on separate branch circuit, not just separate outlets. If same breaker cuts power to two miners, you need to separate them off same circuit.
If you can run your own romex wire, buy 12-3 with ground and run it to a single electric outlet. Break the metal tang off the hot side connection on back. Connect other end to single two-pole breaker in your panel. You must put the two breakers on separate phases. This will give you electric outlet with two separate circuits with 20 amp rating. You can run a second romex for another two circuits.
That is a multiwire branch circuit, and is by far the most efficient way to wire dedicated outlets for miners. You would still need four outlets though, on two circuits, as a 5-20r at 80% loading is only capable of ~1900W. A 1kW power supply will likely have a total consumption 10-20% higher than the rated output, so two = >2200W.
If you are going to DIY, you should google up "multiwire branch circuit" to be sure you've done it right. Things can go bad quick if you wire it up wrong.