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Possible to calculate *displayed* pixels on 24 inch mode 27 inch monitor
Posted: 06 Feb 2025, 08:58
by 99muppets
Bit of a weird question, but the LG 27GX790A-B is available for 500 AUD less than the 480hz ASUS monitor. However I can find barely any fkn info on this monitor, namely the 24 inch mode listed in the manual, NOWHERE and I mean nowhere is the actual displayed / scaled resolution posted.
according to a bili bili review i translated, the monitor just downscales a native 1440p signal and is blurry. I want to figure out EXACTLY what pixel resolution is being displayed in the 24 inch mode. Is this even possible to do? I dont want to deal with stupid ass downscaling i just want pixel by pixel like the asus
Re: Possible to calculate *displayed* pixels on 24 inch mode 27 inch monitor
Posted: 06 Feb 2025, 12:38
by RealNC
99muppets wrote: ↑06 Feb 2025, 08:58
Bit of a weird question, but the LG 27GX790A-B is available for 500 AUD less than the 480hz ASUS monitor. However I can find barely any fkn info on this monitor, namely the 24 inch mode listed in the manual, NOWHERE and I mean nowhere is the actual displayed / scaled resolution posted.
according to a bili bili review i translated, the monitor just downscales a native 1440p signal and is blurry. I want to figure out EXACTLY what pixel resolution is being displayed in the 24 inch mode. Is this even possible to do? I dont want to deal with stupid ass downscaling i just want pixel by pixel like the asus
If you want 1:1 pixels, you don't need the monitor to support this. You can simply create a custom resolution for it and set scaling to 1:1 in the GPU.
To get a 24" image on a 27" 1440p display for example, you would add a 2304x1296 resolution.
Re: Possible to calculate *displayed* pixels on 24 inch mode 27 inch monitor
Posted: 06 Feb 2025, 13:02
by 99muppets
Unfortunately the monitor uses DSC, which means no custom resolutions

, plus (with hopium that in the future custom resolutions are possible) I would like the option to play on stretched resolution for certain games at ~24 inches which I believe would only be possible by utilising the 24 inch mode. And so knowing the exact x-axis pixels would help to have the least blur possible to not require downscaling etc
As I understand, there are certain workarounds to have custom resolutions with DSC, but there’s some stuff about nvidia gpus that I read but don’t understand about high bandwidth display signals not being able to work, smth about the heads of the gpu.
But yeah no DSc toggle on the monitor too which is great
Re: Possible to calculate *displayed* pixels on 24 inch mode 27 inch monitor
Posted: 07 Feb 2025, 02:06
by Chief Blur Buster
In theory, the native 1:1 calculated via a 24:27 ratio would be 2276 x 1280. This is simply from pure mathematics, and rounding up to nearest numbers. The actual 24:27 scaled numbers for 2560x1440 would be 2275.55555(...) x 1280.00000.
However, I don't know how the scaling works on this display, and my current preference is to use a custom resolution + GPU 1:1 scaling.
In other words, a windowboxed resolution inside a 2560x1440 video signal, is something that generally can (in theory) be created independently of whatever 24" mode a 27" monitor has (you'd just keep using the 27" mode and do the 24" mode via the GPU)
Re: Possible to calculate *displayed* pixels on 24 inch mode 27 inch monitor
Posted: 07 Feb 2025, 02:22
by 99muppets
Chief Blur Buster wrote: ↑07 Feb 2025, 02:06
In theory, the native 1:1 calculated via a 24:27 ratio would be 2276 x 1280. This is simply from pure mathematics, and rounding up to nearest numbers. The actual 24:27 scaled numbers for 2560x1440 would be 2275.55555(...) x 1280.00000.
However, I don't know how the scaling works on this display, and my current preference is to use a custom resolution + GPU 1:1 scaling.
In other words, a windowboxed resolution inside a 2560x1440 video signal, is something that generally can (in theory) be created independently of whatever 24" mode a 27" monitor has (you'd just keep using the 27" mode and do the 24" mode via the GPU)
But lets say I wanted to play a 4:3 stretched resolution at 24 inches. I would have to utilise gpu / display scaling along with the 24 inch setting in the monitor's OSD, but not knowing the actual displayed resolution at the 24 inch mode means I would be downscaling / upscaling and it would not be pixel perfect across the horizontal axis.
this is all moot either way considering no custom res with dsc unless theres a way top do it>?
Re: Possible to calculate *displayed* pixels on 24 inch mode 27 inch monitor
Posted: 08 Feb 2025, 12:48
by kyube
99muppets wrote: ↑06 Feb 2025, 08:58
Bit of a weird question, but the LG 27GX790A-B is available for 500 AUD less than the 480hz ASUS monitor. However I can find barely any fkn info on this monitor, namely the 24 inch mode listed in the manual, NOWHERE and I mean nowhere is the actual displayed / scaled resolution posted.
according to a bili bili review i translated, the monitor just downscales a native 1440p signal and is blurry. I want to figure out EXACTLY what pixel resolution is being displayed in the 24 inch mode. Is this even possible to do? I dont want to deal with stupid ass downscaling i just want pixel by pixel like the asus
Try making a 2368x1332 custom resolution (in NVCP, as it's a DSC-based display) and enabling the “No Scaling” option in Nvidia control panel.