Hello all. I have been given a latitiude 7480 laptop with 16Gb for work.  I'm generally happy with it, with one issue.  I want to buy a new monitor, and it would be a 4K model. 

I have checked, and the video card seems to support 4K okay.  However, over HDMI it's only 25Hz (which I'd never use) or over Display Port at 60Hz, which would be fine.  But then, there's no DP on the laptop.  I assume you can use the USB C port? 

Has anyone done this?  I'd hate to buy the monitor and find it's not possible to get the higher resolution at  60Hz.....

Thanks in advance.