Display scaling and CRU

[Mr1991]

I made a 1280x720 resolution at 240hz, but the option to choose between “full screen” and “aspect ratio” on my monitor is still greyed out

What resolution does the monitor say it's receiving? It should say somewhere in the OSD.

It says Current Mode: 1280 x 720 240hz

But the scaling option on the monitor is still greyed out

[ToastyX]

It says Current Mode: 1280 x 720 240hz

But the scaling option on the monitor is still greyed out

That means display scaling is working on the GPU's end. Display scaling means the resolution is sent to the monitor. Is the resolution displayed full screen? If so, the monitor is scaling the resolution even if it doesn't give you the scaling options. 1280x720 would already be the correct aspect ratio on a 1920x1080 screen, so "full screen" and "aspect ratio" would be exactly the same.

[Mr1991]

Yes, but it does it on other resolutions that don’t fit the 16:9 ratio, for example, 1024 x 768, I can set it to either 1024 x 768 with 60 hz, or 1024 x 720 with 75 hz, both of them show the scaling option on my monitor OSD by default, as soon as I set anything above it, like 240 hz, the option goes, this makes me think something else is involved, and like I said, all these resolutions that do give me this option, are the “Established Resolutions” under CRU, why are only these resolutions giving me that option, what’s different about them?

[ToastyX]

Yes, but it does it on other resolutions that don’t fit the 16:9 ratio, for example, 1024 x 768, I can set it to either 1024 x 768 with 60 hz, or 1024 x 720 with 75 hz, both of them show the scaling option on my monitor OSD by default, as soon as I set anything above it, like 240 hz, the option goes, this makes me think something else is involved, and like I said, all these resolutions that do give me this option, are the “Established Resolutions” under CRU, why are only these resolutions giving me that option, what’s different about them?

That's a monitor-specific limitation. Established resolutions are just old industry-standard resolutions. There's nothing special about them. Maybe it doesn't support the scaling option at higher refresh rates, or maybe it only offers the option with certain resolutions. Try 1440x1080 @ 60 Hz and see if it offers the scaling option.

[Mr1991]

1440 x 1080 60 hz does let me use the scaling options in OSD, but no other refresh rates, is this monitors scaler just not legit?

[Mr1991]

Yes, but it does it on other resolutions that don’t fit the 16:9 ratio, for example, 1024 x 768, I can set it to either 1024 x 768 with 60 hz, or 1024 x 720 with 75 hz, both of them show the scaling option on my monitor OSD by default, as soon as I set anything above it, like 240 hz, the option goes, this makes me think something else is involved, and like I said, all these resolutions that do give me this option, are the “Established Resolutions” under CRU, why are only these resolutions giving me that option, what’s different about them?

That's a monitor-specific limitation. Established resolutions are just old industry-standard resolutions. There's nothing special about them. Maybe it doesn't support the scaling option at higher refresh rates, or maybe it only offers the option with certain resolutions. Try 1440x1080 @ 60 Hz and see if it offers the scaling option.

Just curious, where are “Established Resolutions” (on Cru) stored in Windows? Is there a way I can add/edit my own one in the same place as these?

[ToastyX]

Just curious, where are “Established Resolutions” (on Cru) stored in Windows? Is there a way I can add/edit my own one in the same place as these?

Established resolutions are a fixed list of resolutions specified by the EDID standard. You can't add more established resolutions. That's what detailed and standard resolutions are for. CRU creates EDID overrides in the registry (search for EDID_OVERRIDE), which is a binary format, not human-readable. All of the resolutions and other information shown in CRU is part of the EDID.

Your issue has nothing to do with established resolutions anyway. Your monitor just doesn't offer scaling options for some resolutions or refresh rates. That doesn't mean the monitor is not scaling. Any resolution that's not the native resolution involves some processing on the monitor's end, whether it's stretching or centering. Monitors without scalers won't even display non-native resolutions.