I have an i5-7500 with an HDMI 2.1 cable connecting to my 4k monitor. The HDMI cable is 18gbps, so it can handle 4k@60hz. Integrated graphics won't run at 60hz, and only gives me the options of 30hz and below. It's not the monitor, cable, or integrated graphics/cpu because I know the Intel HD 630 can handle 4k@75 hz maximum. All drivers are up to date, including the Intel HD 630, and the i5 7500. My monitor does support 4k@60hz because when i put a gtx 1060 in it and connected with display port, it ran 4k@60hz.