Nvidia has released a firmware update tool to enable the latest DisplayPort 1.3 / 1.4 features. Nvidia states:

Without the update, systems that are connected to a DisplayPort 1.3 / 1.4 monitor could experience blank screens on boot until the OS loads, or could experience a hang on boot.



The post from Nvidia gives some workarounds for users that are experiencing a hang on boot or blank screen with a DisplayPort 1.3 or 1.4 monitor in order to be able to run the update tool. As a note, we would not suggest doing the update unless it is needed. Thanks to @cageymaru for the story.

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Source: [H]ardOCP – NVIDIA Releases Firmware Update For Displayport 1.3 and 1.4