Down-sampling with CRU and display port = Blurry?

antuk15 · Sep 16, 2014

Set up custom resolutions using CRU and my 290, it's connected to my DGM IPS-2701WPH 1440p monitor using DP.

Resolution works fine it's just very blurry!

I remember it being a lot sharper when I did down-sampling on my GTX780 on my old 1080p monitor.

Or is it that down-sampling just doesn't work all that well on AMD cards or could it be the internal scaler on my monitor is rubbish?

Kursah · Sep 16, 2014

I have noticed the same with newer AMD drivers...and I believe how fonts are rendered as well. Is the the same with games too? My games are sharp, but Windows and Desktop are a touch smoothed over with my Dell 3540's 8850m.

antuk15 · Sep 16, 2014

Kursah said:
I have noticed the same with newer AMD drivers...and I believe how fonts are rendered as well. Is the the same with games too? My games are sharp, but Windows and Desktop are a touch smoothed over with my Dell 3540's 8850m.

Games are quite blurry, like they're running with FXAA enabled.

RejZoR · Sep 17, 2014

Well, clearly you can't expect an image to be perfect in anything but native image resolution. Besides, why would you want to do that? Use native resolution and pair it with edge smoothing technique, be it FXAA, MLAA or FSAA.

buildzoid · Sep 17, 2014

RejZoR said:
Well, clearly you can't expect an image to be perfect in anything but native image resolution. Besides, why would you want to do that? Use native resolution and pair it with edge smoothing technique, be it FXAA, MLAA or FSAA.

If you render at 4x the normal pixel count you can get perfect 4 to 1 pixel down sampling with much better sharpness and smothing than any normal AA technique. Down sampling is the same as SSAA.

@ are you running an integer to 1 ratio or some thing weird like 1.5x more pixels.

RejZoR · Sep 17, 2014

But if you don't, you will get blurry mess. You also have to be aware that performance penalty is rather huge. On 1080p screen, that's the equivalent of running 4K resolution without any FSAA (give or take few hundred pixels). On a 1440p it's even greater...

antuk15 · Sep 17, 2014

RejZoR said:
Well, clearly you can't expect an image to be perfect in anything but native image resolution. Besides, why would you want to do that? Use native resolution and pair it with edge smoothing technique, be it FXAA, MLAA or FSAA.

Downsapleing should not be blurry, it was not blurry on my GTX 780

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Motherboard	Asrock B660 Riptide PG (Eternal clock gen)
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Processor	Intel Core i5 12400f at 5.4Ghz
Motherboard	Asrock B660 Riptide PG (Eternal clock gen)
Cooling	ARCTIC Liquid Freezer II
Memory	32GB Kingston FURY Renegade
Video Card(s)	Zotac RTX 4070ti Trinity
Storage	WD SN750 SE 1TB M.2 + 2x Kioxia Exceria 480GB
Display(s)	BenQ EX2780Q 1440p/144Hz
Case	Lian Li 205M
Power Supply	Corsair RM850x SHIFT

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System Name	Gaming PC
Processor	Intel Core i5 12400f at 5.4Ghz
Motherboard	Asrock B660 Riptide PG (Eternal clock gen)
Cooling	ARCTIC Liquid Freezer II
Memory	32GB Kingston FURY Renegade
Video Card(s)	Zotac RTX 4070ti Trinity
Storage	WD SN750 SE 1TB M.2 + 2x Kioxia Exceria 480GB
Display(s)	BenQ EX2780Q 1440p/144Hz
Case	Lian Li 205M
Power Supply	Corsair RM850x SHIFT

Down-sampling with CRU and display port = Blurry?

antuk15

Kursah

Super Moderator

antuk15

RejZoR

buildzoid

RejZoR

antuk15