I don't know. I regularly hook it up to two monitors (one 2560x1440 and one 1920-1200) at the same time (via a USB hub) with zero issues. Not sure how it would

I don't know. I regularly hook it up to two monitors (one 2560x1440 and one 1920-1200) at the same time (via a USB hub) with zero issues. Not sure how it would perform with two 4K. If you search around https://community.frame.work/ https://community.frame.work/, you'll most likely find your answer.