b3nd0vah

This is exactly right, though there isn't much point getting X570 from anyone when the cheaper B550 boards often have the same amount of features and better VRMs for less.

Those Seasonic units you mentioned perform worse than units from the RMx lineup, almost universally, and have confirmed issues with NVIDIA's new cards. I'd take @jonnyGURU's advice for now and try for an RMA. Custom cabling is fairly easy to do yourself if you feel like going that route, there are plenty of places to buy them from otherwise.

Sapphire does all of AMD's reference cards and from what info we have, AMD has told them to go ham on this one. So if it actually exists, I'm expecting something decent.

Well, if you go off the render above, it doesn't look like there are cutouts this time (thank god). Time to see if it actually ends up existing or it turns into a 5600XT reference card that, y'know, never ended up being a thing.

I don't even have to say how bad this is, surely?

Yeah, not sure what you've been seeing but B450 is pretty much the only chipset being recommended for Zen 2. If a person doesn't know the exact reason why they need PCIe4, they have no need for X570 or B550; besides, the good boards have enough VRM capacity for every single AM4 chip currently on the market.

Just adding onto this for anyone else reading. The 450/550W SKUs of the Formula Gold only have a single rail for the PCIe power cables and can trigger protections when used with high transient GPUs such as Vega (ayy) and Pascal.