Intel UHD Graphics 620 Gaming Review and Benchmark Scores
Strangely 4K monitor will only run at 30hz (used to do 60hz) when another monitor is plugged into the PC's HDMI port - USBC-6950-HDMI - Plugable Support
Does the Intel HD Graphics 620 support 4k? - Quora
Intel UHD Graphics of 10th Gen Intel Core U Processors – Laptop Graphics