Asus has even more gaming monitors equipped with HDMI 2.1 ports - The Verge

This model has a 4K VA-type display with a 144Hz refresh rate and 1ms response time.

This model sports two HDMI 2.1 ports with support for FreeSync Premium Pro, variable refresh rate (VRR), and auto-low-latency mode (ALLM).

This model has two HDMI 2.1 ports and two HDMI 2.0 ports, alongside a DisplayPort 1.4 that should be able to push 4K at 144Hz refresh rate.

It’s the ROG Swift PG279QM, a 27-inch 1440p IPS panel with a 240Hz refresh rate, 1ms response time, and HDMI 2.0 ports.