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1080p @ 144 hz on 1440p monitor and AMD card - can't get full screen scaling???
04-13-2019, 02:21 AM (Last edited: 04-13-2019, 02:24 AM by puffelschnitzel)
Post: #1
Question 1080p @ 144 hz on 1440p monitor and AMD card - can't get full screen scaling???
Hello guys,
so after hours and hours of skimming through Google and trying all kinds of stuff I've now finally registered here as a last resort, here's my setup:

Acer Predator XB271HU (connected via Displayport to a)
Radeon R9 280X
Win 10 Pro
Latest AMD driver 19.4.1 installed

So this Acer monitor has a 1440p native resolution and supports up to 165 hz (when activating it's 'OC' mode in the monitor's OSD), otherwise 144 hz.

Whenever I try to run a game with a 1080p resolution @ 144 hz, it will not scale up the image to a full screen no matter WHAT I try within the AMD Radeon driver or the monitor's OSD. It's like the scaling option is stuck to "Scaling Mode: Center"

Here are two images to show you what I mean:

CS:GO @ 1080p
[Image: ZTSbaUr.jpg]

Old Command & Conquer @ 1080p
[Image: Z1rrRfT.jpg]

My GPU scaling option within the Radeon drivers is currently set to 'off' however it doesn't matter if I set it to on and pick any of the scaling mode options. It won't scale it to fullscreen.
There's also an OSD option on my monitor: 'Wide Mode' can be set to either Full, Aspect or 1:1. Changing these options has actually never changed the image I'm seeing on my monitor and I've tried it while in-game, on desktop, using different resolutions / hz so I don't even know why the option is there when it's not doing anything.

But now comes the really weird thing:
I'm running 1440p at 144 hz as my native / desktop resolution.
As soon as I decrease it down to 60 hz within Windows display options, the whole GPU scaling will work perfectly fine and I'm able to play 1080p enlarged to full screen , but with 60 hz only. Whenever I increase that to anything above 60 (I have 85, 100, 120 and 144 hz available in the dropdown), it won't scale the image and I end up with the configuration you see on my screenshots.

I will also add that if I pick a 4:3 resolution of up to 1024x768, everything will work just fine as well (I'll have a 'full screen' with black bars left and right only, running at 144 hz, which is just the way it should be).

Does anyone know how to fix this?Huh I'd be very very grateful... thanks !


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1080p @ 144 hz on 1440p monitor and AMD card - can't get full screen scaling??? - puffelschnitzel - 04-13-2019 02:21 AM

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