Ah, found the dude of this sub that thinks amd is still in the stone age. Have you even seen AMD Adrenalin?
By your own admission AMD is still in the stone age.
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That's not entirely accurate anymore, they've recently added a couple new game engines to it. It was only in the last year or so that DX9 support was added. Evidently Unity games still aren't included, feel free to test it yourself. AMD's software suite is a joke. You must either not use vsync or not play many different games if you didn't realize how often that setting doesn't work. Vsync support should be the bare minimum. That you think it's obvious that they support it when they do not is actually an indictment of AMD.
Who's the "bozo" now?