Radeon rx6600 and 7950x igpu both do not use temporal dithering on 8bit display

jordan

Just wanted to share that I tested the rx 6600 gpu and 7950x igpu which I found zero temporal dithering. I connected them to my eink monitor which is seen as a 8bit display. With eink it has been very easy to see temporal dithering with no need for a microscope or high speed camera. I saw none of that on windows 10 2019 LTSC (build 1809) and latest amd adrenaline driver. I checked the rx6600 with both hdmi and dp. 7950x hdmi. No need to change any settings at all so these should be fine as long as you have a true 8 bit display. Windows and bios are safe from temporal dithering.

The motherboard in the system I tested is this one: https://www.amazon.com/MSI-B650I-Motherboard-Mini-ITX-Processors/dp/B0BHCRX6K7/ref=sr_1_1?crid=YM2ALWEE6N5Z&dib=eyJ2IjoiMSJ9.dgPWv4Jo7o-ffepkvO-QE1ZOicLcXWv7iiu9uSb7gOFHb84CRJktnnF8NQ7BJGICPmzbSrkAFSAIDJLajV_ll-O52wf0Kr5pOSHXc73MtHd1UF2ST-e84_sn6-uvhqfRTK3FGO5rsPHvMUcnVHIYIC0yJw9eM4HLWTHtw74_AZHILKiDGHlLW9cBHpk-XeUQK9iNQcK7_fKdgs-X2hM1tdRjfa8ldJTjB-dxAqRiwpA.evQnz5Nq7X0gXviKTmyXAM3l3L6Y0OxJx8xnfDZJ50I&dib_tag=se&keywords=b650+itx+msi&qid=1761617741&sprefix=b650+itx+ms%2Caps%2C249&sr=8-1

Aquila

Exactly. AMD GPUs are way better than Nvidia GPUs.
I'm with 6750xt and Omen 27q (LG) .
No more migraines for me is a miracle, but, maintaining this 6750xt I want to retest all my problematic monitors to see how my head will reacts.

autobot

Those all use the RDNA 2 GPU architecture. It's probably safe.
The Ryzen 6800H also use the RDNA 2 architecture. It's also the cheapest pc one can buy:$369 for a mini pc(beelink ser5 max with the 6800H APU) at Amazon[1].

[1]https://www.amazon.com/Beelink-SER5-MAX-Computer-Support/dp/B0FC292HNC?crid=2EIREVAMNBK&dib=eyJ2IjoiMSJ9.jLm8KyevFfYiLg3hOlX8X3CslFXT_s2KREJT6exQL_EsptfR-0_PvprcWmCnN8ep0rYvdxa17rVk6F9VCjXCfM-5NkU3z7IL0GkwCoHDFi9N_V-jxN0_06edCCABH0tt9TrcIVaWb70epvxOLkOOZg7qELoXF3ets9HDmD8hUjS9qHapYCQMrUon5N0vBkwvymsOprQX44swJ9jZ1DKPpTdS3YQafWVEVrpXTB5GpAo.ZjBA07y3BqFASEI8trEXa1EHgv860e7duHGhBrCAaXk&dib_tag=se&keywords=ryzen%2B6800h%2Bdesktop&qid=1761653022&sprefix=ryzen%2B6800h%2Bdesk%2Caps%2C344&sr=8-18&th=1

autobot

I'm from outside the US, but curious.

For a US based customer, is it possible to return a mini PC to Amazon, after use, and get a full refund ?

jordan

autobot Normally if its prime fulfilled but Ive returned several things recently so just dont want to return anything else for awhile lol.

Sunspark

Steam Deck is RDNA 2 as well, and I think it does dither, but I don't have any equipment that can show it. I am just intuiting it based on "feel" on my monitor compared to my iGPU HD Graphics 6000.

It is not bad however! It is definitely usable both on the LCD screen and the monitor. (If a reader here, ever gets one, stick with the LCD one, you'll be sorry if you get the OLED version as that one has strong PWM whereas the LCD one does not over 50% brightness.)

I was away from my monitor and the Intel for a month as I was on a trip, and was mostly just on my smartphone. I returned the other day, and back on the monitor I'm like wow, my eyes are focusing badly. I really need a new prescription! I was going to get one on my trip, but I got bit by a mosquito on my eyelid which swelled my eye closed and threw my timetable off. Blah.

autobot

Sunspark good to know.

I asked gpt, it explained how to disable dithering on the steam deck, it's at the end of the conversation:

https://chatgpt.com/share/6905096c-05b8-8003-8f31-0d8c19727663

If you do try, it would be interesting to learn how it went.

JTL

Sunspark whereas the LCD one does not over 50% brightness.)

How bad is it anyway? 😆

jordan

Sunspark

when I looked at the steam deck it felt awful right away. if you can enter the disable off registers then it could work

Sunspark

I'll look later, but taking a look at that output, it looks like AI hallucination.

This is one of the problems with AI, it doesn't like saying "I don't know".. it will create something just to have an answer.

JTL

Sunspark I'll look later, but taking a look at that output, it looks like AI hallucination.

amdgpu.dither_mode isn't a real parameter.

Sunspark

JTL Not bad actually, someone checked it out with a Radex. See the pictures here, https://www.reddit.com/r/SteamDeck/comments/17yf90o/analysis_of_the_pwm_of_the_steam_deck_lcd_screen/

Oh, the thought occurs that you might have meant the OLED. It's pretty bad. Full modulation depth, on and off. https://www.reddit.com/r/SteamDeck/comments/1882kys/analysis_of_the_pwmflickervisual_fatigue_of_the/

Aquila

What about 780m and 8745hs?
I have a new Mini PC with these specs