Question Refresh rate drops from 240hz to 144hz ?

aymanfarshid94

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Hi, hope everyone is doing well and safe

I recently got a used monitor LG UltraGear 27GN750-B 240hz for a decent deal. However, I have some concerns I would like to get an expert review on.

I enabled 240hz (which was on default) using display adapter properties in Windows and turned off FreeSync using the monitor OSD.
I tried playing Valorant and since I had been using a 4:3 resolution of 1280 x 960 in game, I selected the same (1280 x 960 @ 240hz) after plug and play and noticed that on the OSD it drops to 144hz now. However, back on the desktop the OSD shows 240hz again.

I created a custom resolution 1440 x 1080 @ 240hz (4:3) in the AMD control software. I chose this resolution now in-game and some reason again the OSD shows the refresh rate both in game menu and during a game shows 144hz now instead of 240hz. I tested the same circumstances with FreeSync ON and there was no difference

Then I discovered that (FreeSync ON or OFF) if I have the in-game resolution as 1920 x 1080 240hz (same as the desktop native res) the OSD shows 240hz everywhere in-game both menu and during gameplay, that is something I dont understand as lower resolutions should generally support higher refresh rates.

FPS during 1920 x 1080 / 1440 x 1080 is usually around the 250 mark with ups at 320 and downs at 200 or so, never discovered any tears.

So far, opened a ticket with valorant support and as per reddit comments seems like some setting is limiting the 240hz to enable in-game at the custom resolution.

I am using a HDMI cable from GPU to Monitor

PC specs - i7 7700 with corsair H120mm liquid cooler / 16GB RAM / XFXX RX 580 8GB / WIN 10 AND VALORANT ON M.2 SSD

Looking forward to your suggestions and help, thank you


EDIT - I contacted Riot/Valorant support before and they have sent me a set of instructions to reset my local saved game and settings, hoping that will fix it when i try it out after reaching home in a couple of hours.
 
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aymanfarshid94

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Have a look at the monitors instruction manual, it should say at what resolution 240Hz is supported. Quite often the maximum refresh rate is only supported at the native resolution or a small selection of resolutions.

Hi so after your reply, I searched the internet and found an owners manual pdf, this seemed informational and likely why I am not able to get it at 240hz.

https://ibb.co/zHSmRdK

Is there a workaround for this, maybe using DP cable will work? Most monitors as I know support 1280 x 960 or 1440 x 1080 at 240hz like how these pro gamers and streamers play

EDIT: I just tried 1440 x 1080 240hz and it works on the desktop with no issues so clearly it is supported I guess
 
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Hi so after your reply, I searched the internet and found an owners manual pdf, this seemed informational and likely why I am not able to get it at 240hz.

https://ibb.co/zHSmRdK

Is there a workaround for this, maybe using DP cable will work? Most monitors as I know support 1280 x 960 or 1440 x 1080 at 240hz like how these pro gamers and streamers play

EDIT: I just tried 1440 x 1080 240hz and it works on the desktop with no issues so clearly it is supported I guess
What happens when you use one of the resolutions that the instructions say 240Hz is supported? Unless its a resolution specifically stated as supporting 240Hz you can only try and see if it works but there is no guarantee.
 

aymanfarshid94

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Feb 5, 2018
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hey, yes 240hz works on all the resolutions mentioned as per the document starting from 1024 x 768 / 1366 x 768 / 1920 x 1080 on HDMI. However I have solved the issue and now have 1440 x 1080 240hz in game and my OSD shows the same.

I tried resetting the local files and settings as what the valorant support suggested but it didnt change anything. I went into my AMD software and enabled GPU scaling ON instead on OFF which was previously and now it works fine. I tried this a couple of times by having it OFF and starting the game and it dropped to 144hz. GPU scaling on (preserve aspect ratio or full screen) allowed the custom resolution to work in game with the native refresh rate. I will pass this message to valorant support so they can make a note of it and help others.

thank you for your input and your time, how to close this as solved
 

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