Quote:
Originally Posted by pherzfeld
Two screens - Main screen over hdmi running 1080p - second monitor running on DVI to display port adapter (generic, not apple) running 1080p.
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Can you please verify you are running displays on separate GPU's or by any chance both on one? You can get this information from the Apple menu, About This Mac, System Report, Hardware, Graphics/Displays. In case both displays share same GPU and you have a free GPU doing nothing, just swap the DP adapter to another TB slot and try again.