Will an HDMI 2.1 switch pass 4K 120Hz with HDR on a PS5 and a TV?

You do not need a matrix for a single TV. A proper HDMI 2.1 switch that supports full bandwidth will pass 4K 120 with HDR and keep VRR and ALLM working with a PS5 and a gaming PC.

I'd pick UGREEN 8K@60Hz since it handles 4K 120 and VRR cleanly. Use certified Ultra High Speed HDMI cables and set the TV input to enhanced so the handshake is reliable.

You only need a proper HDMI 2.1 switch for that setup. A matrix is for sending different sources to different screens not for one TV. A full bandwidth switch keeps 4K 120 HDR, VRR, and ALLM intact. Simple.

Keep cable runs short and use certified ones, power the switch from the included adapter instead of a TV USB port, and enable the TV game or enhanced mode on that HDMI input. Do that and the system stays stable with no weird sync issues.

Run a PS5 and a tower into a single TV through a two in one out HDMI 2.1 switch and it has been flawless so yeah no matrix needed. High frame rate, HDR, VRR, ALLM all stick. No drama.

My only hiccup was a bargain cable that would freak out at 120 and flash to black now and then. Swapped in an Ultra High Speed cable and set the TV HDMI input to the game enhanced option and the problem vanished, I can bounce between console and PC quickly and the handshakes are smooth.

Use a full bandwidth HDMI 2.1 switch to run 4K 120 with HDR from a console and PC to one TV with VRR and ALLM, no matrix needed.. :) use Ultra High Speed certified HDMI cables, set the TV input to enhanced or game mode for proper FRL, and keep firmware updated to avoid handshakes or dropouts.

Matrix not required for one display. What matters is that the switch handles the full 48 gigabit pipeline and supports FRL transport not older TMDS. That like, keeps 4K 120 HDR, HDMI Forum VRR, and ALLM alive from both sources.

For PCs, VRR will work over HDMI if the GPU supports HDMI VRR. Some GPUs only do adaptive sync over DisplayPort, so check that your card can do HDMI VRR before blaming the switch. If you see black screens at 120, try shorter certified cables and make sure the TV input mode is set to enhanced. EDID passthrough on a decent switch will advertise the TV capabilities correctly to each source.