Various devices I had attached (PC, XBox Series X, Apple TV) list maximum supported 60 Hz with this TV. However, there is an HDMI 4 output that is supposed to deliver 4K@120 Hz when gaming mode is activated, according to Samsung (https://www.samsung.com/ch...). I have not (yet) been able to reproduce this consciously - the gaming mode goes on and off as it wants, possibly it actually supports 120 Hz as long as it is on, but does not switch to on when only the display settings of the corresponding devices are open.