What and motherboard are you pairing it with?
The question of UHD 770 support has been asked repeatedly across forums like tonymacx86 and Reddit. In April 2024, a user with a 13900K and an Asus Z790 motherboard asked, "Is there ANY way to spoof/modify the iGPU configuration in OpenCore so that the port can be active and sending a video signal?" The consensus was decisive: "the clear consensus is that the 13900K iGPU (UHD 770) is not supported on a Hackintosh as there is no support for the UHD 770 in MacOS." uhd 770 hackintosh hot