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Cannot achieve 144HZ on my LG 27GL850 with HDMI cable

Fuzzyy
By Fuzzyy
in Displays
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So I have the LG 27GL850, which is 2560x1440, 144Hz monitor. I know this monitor and my GPU supports HDMI 2.0 and both ports on my GPU and my monitor are HDMI 2.0 ports. Main reason I don't want to connect with DP is that I have my M1 Macbook  connected with DP to type-c cable to have 144hz there. I don't know what am I missing here, I tried every HDMI port combination possible, and I still can't get over 100Hz on 2560x1440. Any ideas?

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Laptop: 2020 M1 Macbook Air 8/256

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The HDMI 2.0 spec allows for 144 Hz, but the monitor may only have implemented up to 100 Hz.

 

[Edit] Do you have Freesync or Adaptive Sync (in the OSD) enabled? It looks like it's limited to 100 Hz over HDMI in that case:

https://www.rtings.com/monitor/reviews/lg/27gl850-b

https://forums.tomshardware.com/threads/lg-27gl850-b-only-displaying-option-for-100hz-not-144hz.3655250/

 

Maybe try disabling those if so.

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4 minutes ago, tikker said:

The HDMI 2.0 spec allows for 144 Hz, but the monitor may only have implemented up to 100 Hz.

Exactly. Some monitors are like this. Seen it myself, with a friends monitor. 

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14 minutes ago, Fuzzyy said:

So I have the LG 27GL850, which is 2560x1440, 144Hz monitor. I know this monitor and my GPU supports HDMI 2.0 and both ports on my GPU and my monitor are HDMI 2.0 ports. Main reason I don't want to connect with DP is that I have my M1 Macbook  connected with DP to type-c cable to have 144hz there. I don't know what am I missing here, I tried every HDMI port combination possible, and I still can't get over 100Hz on 2560x1440. Any ideas?

If its 27GL850-B then it supports 144hz over hdmi, from LG's site: https://gscs-b2c.lge.com/downloadFile?fileId=QzTC8uoMuZpLffcL5QGhJQ

image.png.d70093a02832f05560534bd4049c10e1.png

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6 hours ago, DoctorNick said:

If its 27GL850-B then it supports 144hz over hdmi, from LG's site: https://gscs-b2c.lge.com/downloadFile?fileId=QzTC8uoMuZpLffcL5QGhJQ

image.png.d70093a02832f05560534bd4049c10e1.png

This exactly answers my question, thank you for sharing this!

CPU: Ryzen 5 5600X - GPU: EVGA RTX 3070 XC3 ULTRA - Motherboard: ASUS ROG STRIX B550-I - Ram: Corsair Vengance LPX 16GB @3200Mhz - CPU Cooler: Noctua NH-L12S - PSU: Corsair SF600 Platinum - SSDs: WD Black SN750 500GB w/ EKWB Heatsink - Case: FormD T1

Laptop: 2020 M1 Macbook Air 8/256

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3 hours ago, Glenwing said:

That monitor is limited to 100 Hz over HDMI while FreeSync is active.

Thanks, thats exactly it!

CPU: Ryzen 5 5600X - GPU: EVGA RTX 3070 XC3 ULTRA - Motherboard: ASUS ROG STRIX B550-I - Ram: Corsair Vengance LPX 16GB @3200Mhz - CPU Cooler: Noctua NH-L12S - PSU: Corsair SF600 Platinum - SSDs: WD Black SN750 500GB w/ EKWB Heatsink - Case: FormD T1

Laptop: 2020 M1 Macbook Air 8/256

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7 hours ago, tikker said:

The HDMI 2.0 spec allows for 144 Hz, but the monitor may only have implemented up to 100 Hz.

 

[Edit] Do you have Freesync or Adaptive Sync (in the OSD) enabled? It looks like it's limited to 100 Hz over HDMI in that case:

https://www.rtings.com/monitor/reviews/lg/27gl850-b

https://forums.tomshardware.com/threads/lg-27gl850-b-only-displaying-option-for-100hz-not-144hz.3655250/

 

Maybe try disabling those if so.

Thats it, thank you!

CPU: Ryzen 5 5600X - GPU: EVGA RTX 3070 XC3 ULTRA - Motherboard: ASUS ROG STRIX B550-I - Ram: Corsair Vengance LPX 16GB @3200Mhz - CPU Cooler: Noctua NH-L12S - PSU: Corsair SF600 Platinum - SSDs: WD Black SN750 500GB w/ EKWB Heatsink - Case: FormD T1

Laptop: 2020 M1 Macbook Air 8/256

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