Question How big of a power suplly do I need

Sagar_20

Distinguished
It's TDP is almost twice of what you have already.

You would definitely need to upgrade your power supply to at least 750 W.

That's what AMD recommends.

Factory overclocked models may need even more power.

So, upgrading to 850 W would be a good idea, or just get the 8 GB RTX 2060 Super and use it along with your current 650 W PSU.