"DX12 is not supported on your system. Try running without the -dx12 or -d3d12 command line argument" when opening valley of the ancient demo

Development Getting Started & Setup
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Windows 7 64 bit, i know sorry 24gigs of DDR3, AMD FX-4350 Processor and a R9 280x GPU

Kinda old rig, Maybe drivers out of date? Id prefer not to go through that if thats not the issue though, as someone else pointed out i think I would have had some issues by now if I didnt have DX12

Or possibly an issue with the older W7 OS?