You wont get past 500watts of power draw with any of the ryzen chips. MAYBE on threadripper and fancy cooling.
OP, I would recommend a single rail power supply that can do at least 650 watts. You always want some headroom.
You also want a BETTER power supply.
That corsair only allows you EITHER 4+4 cpu power and a single 6+2 PCIE power, or 2x PCIE 6+2 plugs with no cpu power. It is also rated for its power ONLY at 40*C, which means you would need to keep airflow around that PSU to keep it healthy with a high load.
Find a newer corsair or EVGA power supply that can support dual CPU power plugs (lots of motherboards have 8+4 pin cpu power anyways) and should ALSO support 2x or 4x PCIE 6+2 power.
That RM550 would be good for a low power single PCIE power plug video card and minimal cpu overclocking.
My older EVGA 850watt Supernova G2 would be a great choice, you can still find them brand new online, and it has ran my power hungry computer very well for quite some time.