Glad to see that the MoBo and CPU should pair without fault for the 3090. Truthfully I haven’t refreshed myself on hardware jargon since I built my PC around 2018.
you will need more RAM
That was a complete typo on my part, I meant to put x4 8GB for 32GB total.
PSU was expected, upgrading to a GPU that maxes 350W on its own. Will probably be looking into a 1000W unit on your recommendation, just for future proofing