The iGPU on my 9950X is perfectly capable of driving my Dell U4025QW 5k2k ultrawide. Yeah it would suck for any modern 3D games, but for productivity or light gaming it's fine.

It requires I use the DisplayPort out on Linux because I can't use HDMI 2.1. Because the motherboard has only 1 each of DisplayPort and HDMI this limits my second screen.