> For motherboards sold at retail the manufacturer's site will normally have a list, and they may provide some BIOS updates over time that extend compatibility to newer chips.

Ah, but if you want to buy a newly released CPU and the board does support/work with it, but nobody has updated the documentation on the website: How do you know?

Ultimately it's always a crapshoot. Some manufacturers don't even provide release notes with their BIOS updates...

Back in the day, this is what forums were for. Unfortunately forums are dead, Facebook is useless, and Google search sucks now. So you should just buy it, if it doesn't work ask for a refund and if they refuse just do a chargeback.