Question USB-C (DP Alt) Vs HDMI 2.1

[EYO117]

Monitor is Acer XV275K
Laptop is MSI GP66HX (3070 Ti)

Whats''s interesting is that I can select 160hz @ max resolution (4k) via HDMI 2.1 but everything i've read says it shouldnt be possible. The same settings can be achieved running USB-C

My question is am I really getting the 160hz via HDMI 2.1, or should I use USB-C, and also, which has less input lag? I've read HDMI 2.1 has less input lag. I can't tell a difference, but was wondering if one you all could look into this for me more.

Thanks

 

[rgd1101]

https://www.acer.com/us-en/monitors/gaming/nitro-xv5/pdp/UM.HXXAA.301
monitor only support 144 with hdmi

 

[EYO117]

https://www.acer.com/us-en/monitors/gaming/nitro-xv5/pdp/UM.HXXAA.301
monitor only support 144 with hdmi

Thanks for your response. In the tech specs, it also says 160hz over USB-C so that would be better?
https://www.testufo.com/ Shows me at 160hz over HDMI 2.1

If I have them both plugged, the monitor chooses HDMI 2.1 over USB-C

 

[hotaru.hino]

Which protocol you use (HDMI or DP) does not have any meaningful effect on input lag.

If the resolution and refresh rate are the same otherwise, there's no difference in which protocol you use.

 

[EYO117]

Which protocol you use (HDMI or DP) does not have any meaningful effect on input lag.

If the resolution and refresh rate are the same otherwise, there's no difference in which protocol you use.

Thanks for the response. Others please feel free to give your thoughts. USB-C VS HDMI 2.1 which one is better