This is a two part question:
First, I need a graphics card that supports UEFI with CSM disabled and that can support dual VGA monitors. This is for a server, so I don't need any GPU horsepower. I'm looking at the AMD Radeon HD 8350 but the specs and technical documentation make no mention of what VBIOS is supported.
Second, the OS is Windows Server 2012 R2. This OS is not listed as a supported OS on the AMD site, yet Microsoft claims the entire AMD Radeon HD 8000 series is supported. See Windows Server Catalog. Why is this OS not included in AMD's list of supported OSes?