Something is way wrong - my 5800X on air cooling with a 3060, 2 SSD's and 2 spinners, at mostly idle only pulls around 80W or so. The 3060 idles at ~13W.
Your numbers aren't adding up - if you're only measuring PC power (no monitors, etc.), then based on your numbers, by process of elimination your motherboard is somehow drawing an obscene amount of power.
You didn't mention what kind of cooling you were using. An AiO will obviously draw more power than an air cooler, but that total power draw still sounds high even with it.
Hit the VRM's with a temp gun, I can't imagine the m/b will be pulling that kind of power without something on it getting really hot.