Do I need a BIOS update to use 32GB of RAM?

Probably not. Most modern motherboards handle 32GB out of the box without a BIOS update. Updating just for capacity is overkill and risky — a failed update can brick your machine. Only update if you’re on very old hardware (like first-gen Ryzen), have specific compatibility issues, or the manufacturer explicitly requires it. Otherwise, install the RAM and see if it works first.