Have had a Denon AVR-X4700H (as a preamp) for a bit over a week now and have the following observations.
HDMI video mode testing through the AVR-X4700H 8K input (display is a Samsung 75" Q70, Capable of 4K 60Hz, 2560x1440 120Hz, VRR - no eARC):
2560 x 1440 (1440P) input is only supported at...