1. The Intel® HD graphics 4600 supports the following resolutions
eDP/DP/HDMI/VGA 3840x2160@60Hz 3840x2160@60Hz 2880x1800@60Hz
2. Color depth supported 16bit and 32bit and using the monitor as Clone or Extended mode will use any if the supported modes.
3. We have been able to connect Ultra high definition monitors and 4k monitors without any problems, obtaining a really high-quality video.
Hope this information is helpful.
Please do let me know if you need further assistance with your Intel product, I will be glad to assist you.