6 ms·

60fps is not a limitation of HDMI. I have an LG OLED that has HDMI 2.1, which can do 4k120fps (at least). Unfortunately current-gen GPUs only support HDMI 2.0,

60fps is not a limitation of HDMI. I have an LG OLED that has HDMI 2.1, which can do 4k120fps (at least). Unfortunately current-gen GPUs only support HDMI 2.0, so I am limited to 1440p120fps or 4k60fps for the time being.

Fnoord 6y ago
OK, it was a limitation of HDMI, and most devices still use that old HDMI standard, so practically it still is a limitation until the new HDMI versions are more common. On my monitors, I use DP whenever I can.
- mumblerino 6y ago
  No it’s not. HDMI can do it, it’s the device that you pick that decided it won’t, by picking an older standard.
  - Fnoord 6y ago
    Apparently HDMI 2.1 which specification is from November 2017 can do it. My TV itself is even older than that, and a dumb TV doesn't need to be upgraded often. That's part of the purpose of a dumb TV; longevity. My MBPs from 2015 also don't support it, and Apple only recently released a decent replacement for these MBPs (given the keyboard issues in previous). My old monitor from ~2014, a BenQ, also does not support it. While I recently replaced it, it still works perfectly fine (it doesn't have FreeSync though), and achieves 144 Hz over DP.
- mnw21cam 6y ago
  The main disadvantage of DP over HDMI is that if you switch off a monitor that is connected to the computer via DP, then the computer thinks the monitor has been disconnected, and rearranges all your windows for you, so when you come back to the computer and switch the monitor back on it's all messed up. With HDMI, that doesn't happen.
  - Fnoord 6y ago
    True, that can be a disadvantage (can also be an advantage though).
  - smileybarry 6y ago
    In my case this was an advantage because my previous GPU had a bug where presence detection for HDMI was only done on boot. So if I forgot to switch my display on before UEFI or before Windows boot manager started, it would boot headless. With DisplayPort you have to unplug & replug at best (though on/off should work because of what you described, not to mention detecting a new display when it powers on).
  - EricE 6y ago
    Only on Windows. This isn't an issue with macOS. Also some people have pointed out a few displayport edid emulators keep the appropriate signals up to prevent Windows from thinking the monitor is off. I haven't tested it yet as when I first ran into this problem I just switched back to DVI, but a recent Windows or nVidia update (ha - timely with the article) caused my GPU driver to constantly crash with DVI, but when I switched back to DP it now works just fine. Sigh. I guess I do need to see if I can find the right kind of EDID emulator after all.
  - wolrah 6y ago
    This has nothing to do with DisplayPort itself and everything to do with a bad implementation in the monitor. The DisplayPort spec actually explicitly says to not do what these defective monitors are doing.
AnssiH 6y ago
You can use a Club3D CAC-1085 DP1.4-to-HDMI2.1 adapter to get 4k120 with current GPUs with LG 2019 OLED TVs. No VRR (Variable Refresh Rate) though, so I'm just waiting for new GPUs myself.

Fnoord 6y ago

OK, it was a limitation of HDMI, and most devices still use that old HDMI standard, so practically it still is a limitation until the new HDMI versions are more common. On my monitors, I use DP whenever I can.

mumblerino 6y ago
No it’s not. HDMI can do it, it’s the device that you pick that decided it won’t, by picking an older standard.
- Fnoord 6y ago
  Apparently HDMI 2.1 which specification is from November 2017 can do it. My TV itself is even older than that, and a dumb TV doesn't need to be upgraded often. That's part of the purpose of a dumb TV; longevity. My MBPs from 2015 also don't support it, and Apple only recently released a decent replacement for these MBPs (given the keyboard issues in previous). My old monitor from ~2014, a BenQ, also does not support it. While I recently replaced it, it still works perfectly fine (it doesn't have FreeSync though), and achieves 144 Hz over DP.
mnw21cam 6y ago
The main disadvantage of DP over HDMI is that if you switch off a monitor that is connected to the computer via DP, then the computer thinks the monitor has been disconnected, and rearranges all your windows for you, so when you come back to the computer and switch the monitor back on it's all messed up. With HDMI, that doesn't happen.
- Fnoord 6y ago
  True, that can be a disadvantage (can also be an advantage though).
- smileybarry 6y ago
  In my case this was an advantage because my previous GPU had a bug where presence detection for HDMI was only done on boot. So if I forgot to switch my display on before UEFI or before Windows boot manager started, it would boot headless. With DisplayPort you have to unplug & replug at best (though on/off should work because of what you described, not to mention detecting a new display when it powers on).
- EricE 6y ago
  Only on Windows. This isn't an issue with macOS. Also some people have pointed out a few displayport edid emulators keep the appropriate signals up to prevent Windows from thinking the monitor is off. I haven't tested it yet as when I first ran into this problem I just switched back to DVI, but a recent Windows or nVidia update (ha - timely with the article) caused my GPU driver to constantly crash with DVI, but when I switched back to DP it now works just fine. Sigh. I guess I do need to see if I can find the right kind of EDID emulator after all.
- wolrah 6y ago
  This has nothing to do with DisplayPort itself and everything to do with a bad implementation in the monitor. The DisplayPort spec actually explicitly says to not do what these defective monitors are doing.

AnssiH 6y ago

You can use a Club3D CAC-1085 DP1.4-to-HDMI2.1 adapter to get 4k120 with current GPUs with LG 2019 OLED TVs. No VRR (Variable Refresh Rate) though, so I'm just waiting for new GPUs myself.