4 ms·

Unanswerable without specifying what laptop you have.

• rahimnathwani 2y ago
  Sorry, I should have Googled before asking the question. I just did, and see that my monitor (Dell AW3821DW) supports only 85Hz over HDMI, but up to 144Hz over DisplayPort. The laptop's spec page doesn't say what refresh rates are supported for external displays (except saying at least 60Hz): https://support.apple.com/en-us/111901 https://support.apple.com/en-us/111901 I'll buy a new cable right now :)
  • rowanG077 2y ago
    Yes that macbook pro supports outputting even 4K @ 144hz over displayport so it should work easily.
    • rahimnathwani 2y ago
      With the new cable, MacOS is showing the refresh rate is variable 1Hz to 144Hz.