I recently changed my graphics card from a GeForce 970 to a Vega64, and now I get very low FPS (around five-ish) with the DX11 client. Frame rates drop as soon as I enter character selection, the settings menu on the main screen before that is still fluid.
DX9 client is unaffected, everything runs fine there.
If anyone got the game running fine with a Vega and the DX11 client: I’d be grateful if you could post your settings
EDIT: Resolved, see below.