This one https://forum.ethereum.org/discussion/11159/rx-480-sapphire-nitro-oc-4gb-modded-to-8gb-31-mh-1225-2200-mhz

says that I should download

Amd catalyst center version 16.9 or 16.11 other versions need to be patched to work with modded bioses as they check for the bios signature and will deactivate the card

The problem is, other versions of what?

What is catalyst center? Is it a driver for AMD radeon or what?

I thought the drivers name is called crimson

Where can I download it because I do not see catalyst center 16.11 anywhere on page mentioned.