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April 9th, 2024 12:08

AW3225QF (and likely other Gen 3 QD-OLED models) - HDR Peak 1000 bad PQ tracking compared to DisplayHDR True Black

Hello

I purchased the AW3225QF a while ago and while it has mostly been a joy to use, there is one issue with it which I would consider pretty significant. It is related to the brightness of the monitor inside the HDR Peak 1000 mode. 

One of the first things I did after getting it was experimenting with HDR Peak 1000 and DisplayHDR True Black 400 as I had heard differing opinions when it comes to these. While the HDR Peak 1000 mode obviously produced much brighter highlights in low APL scenarios, I also noticed that in higher APL scenarios it was significantly dimmer than the True Black mode. This is the case even when there is no apparent reason for it, i.e. no bright highlights on the screen. And since most reviewers simply said that Peak 1000 was preferable in most scenarios due to its higher brightness, I simply dealt with it and assumed that was how it was supposed to look. 

However, recently TFTCentral looked into this issue and their findings suggest that there is a problem with the Peak 1000 mode. I will note that their testing was not done specifically with the AW3225QF, but the same behaviour is very much happening on this monitor as well (and likely all other Gen 3 QD-OLEDs, as mentioned in the article). The issue is that the PQ EOTF tracking is honestly not good at all when it comes higher APL scenes (around 10% and above), specifically for midtones. This results in the overall screen brightness being significantly lower in a lot of scenes on the Peak 1000 mode when it really shouldn't be. At times, the luminance can be almost 50% lower. While some roll off is fine, this is way too drastic.

To me, this is a big issue which I think needs attention. The result of this problem is that there is no HDR mode which is preferable in all scenarios. In brighter scenes with generally higher APL, DisplayHDR True Black 400 will often look much better than Peak 1000. However, in darker scenes where you really want those bright highlights Peak 1000 will be the better choice. So unless you're fine with dim e.g. outdoor scenes, you'll have to sacrifice the punchy highlights. I hope this is something which is being looked into. 

More details can be found in the article written by TFTCentral: https://tftcentral.co.uk/articles/testing-hdr400-true-black-and-peak-1000-mode-brightness-on-new-oled-monitors#Key-update-Heres-why-TB400-can-sometimes-look-brighter-than-P1000

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6.1K Posts

April 9th, 2024 17:16

My 2 cents is that 1 is VESA certified profile, while the other is not.

Would be interesting to see if they can correct the issue by reprofiling the display.

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April 10th, 2024 11:43

@Vanadiel​ Could definitely be related. My hope is just that this isn't an issue that has to be fixed by the panel manufacturer (Samsung), since this issue seems to be affecting all the new Gen 3 QD-OLED monitors. Fingers crossed!

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April 11th, 2024 23:48

I also own the QF and I haven't been satisfied with the performance of the peak 1000 mode as well. It's interesting because AW3423DWF model which I had before, I recall it having issues with the peak 1000 mode too. But it was remedied by firmware updates though so I hope they fix the QF too. 

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April 22nd, 2024 05:21

This seems to be the main issue with the monitor after the first few firmware updates. I really hope it is fixed soon.

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April 23rd, 2024 18:13

I was surprised to come here and see that this issue is so big on Reddit, but barely flagged on the official forums to actually flag a need for Dell to fix this. Regardless, I'm glad this was flagged, and I hope the Dell Team is able to add it to the list of bugs to be addressed with a future update (or it's maybe already in the backlog). 

It certainly breaks bright scenes in HDR1000, and it's too annoying to switch between HDR1000 and HDR400 (where bright scenes look closer to their expected brightness) in games that say, cycle between night and day during the game. So I use HDR1000 for the brighter nighttime highlights, and certainly get a worse experience during the in-game bright day for it. Because the overall daytime environments are much too dark in HDR1000 compared to how they appear in SDR and HDR400. The daytime highlights are not any brighter than HDR400 since in those high ABL scenes they would be typically capped to less than 400 nits, yet the rest of the scene is unnecessarily darker / "grayer".

This can make something like bright blue sky during the day look like cold gray, at worst making it feel like a cloudy day when it's supposed to be a sunny day. I suspected this was done semi-intentionally to keep the perceived ratio between highlights (which are now less bright due to ABL) and the other things like sky (which has to be brought down to create an opening for brighter highlights to still pop). But this is highly undesirable, since at a high ABL of your average daytime scene those highlights would be capped to a far lower max brightness, and adjusting the brightness of the entire environment relative to the already lower brightness of daytime highlights is a significant bug. 

Max HDR1000 brightness in high ABL scenes does not exceed what HDR400 is capable of reaching, yet this issue does not manifest there to the same degree, and the latter shows much more desirable behaviour, showing that this is not implemented correctly in the HDR1000 mode. And that high ABL content should more closely resemble the HDR400 PQ tracking than it currently does. Low ABL behaviour (such as during night scenes) is excellent in the HDR1000 mode, so it shouldn't be changed. But PQ tracking should be adjusted for high ABL scenes, where environments shouldn't be getting anywhere as dim as they currently are. 

This also extends to the way Windows desktop looks with HDR1000 enabled, where bright content is significantly dimmer than in SDR/HDR400 for no good reason, with nothing on the screen exceeding 300 nits, and bright greys dimmed to as low as sub-100 nits.

I hope Dell is able to address this with a firmware update pushing some tuning to the HDR1000 profile, or a new cloned profile with a fix eliminating excessive dimming of bright scenes.

(edited)

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April 23rd, 2024 19:17

The below graph by TFT Central illustrates the incorrect HDR1000 ABL/PQ tracking behaviour in bright scenes relative to significantly more desirable behaviour of the HR400 mode. Again, HDR1000 works perfectly in dark scenes. But in any higher APL content, such as bright scenes and desktop windows, any bright greys or bright colors will be significantly excessively dimmed/muted, relative to SDR, and the HDR400 mode.

Despite "whites" in high APL scenes being capped to similar brightness levels in both HR400 and HDR1000 modes at best, the HDR1000 mode excessively dims everything else:

(edited)

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April 23rd, 2024 21:37

@simon247​ yes this seems fixable by a patch. Come on Dell the support so far has been great

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April 23rd, 2024 21:55

To add, the desired behaviour would be for Peak 1000 mode to operate the way it does when highlights can reach more than 400-500-ish nits (low APL content/dark scenes), and it to start behaving more like the HDR400 mode with high APL content/bright scenes where peak brightness can't reach those high levels anymore, without excessively dimming everything else.

We know this is possible, because SDR and HDR400 modes already behave this way in high APL content. Peak 1000 gets significantly dimmer overall for no good reason except to maintain a ratio between peak highlights and everything else (which doesn't make sense once those highlights can't get bright due to ABL).

Those monitors are already clearly capable of doing both - you'd just need to manually switch the preset between HDR1000 and HDR400 when the on-screen environment changes, which would be very annoying.

If there are *any* good reasons for the Peak 1000 preset to remain as is, the best way for Dell to address this, would be by giving us a new tweaked HDR1000 preset with a smooth curve transitioning between low APL optimized behavior resembling the current HDR1000 preset, and gradually transitioning into high APL optimized behavior that resembles the HDR400 preset.

(edited)

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April 23rd, 2024 21:58

Same here. HDR 1000 is disappointing on the AW3225QF. Hopefully they can improve with a firmware update

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April 23rd, 2024 22:14

I also have this problem. A fix in a firmware update would be great :O

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April 23rd, 2024 22:31

Love to see some more attention regarding this problem! Hopefully it is at least on Dell's radar at this point. Some great comments in this thread highlighting the issue better than I did in the original post.

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April 23rd, 2024 22:45

Yeah, I've got this problem too. Seems like everyone's monitor behaves like this... Dell, pls fix?  :) 

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April 24th, 2024 00:32

My aw2725df is noticeably bad too, I thought it was just me because no one else was posting about it. Dell needs to fix.

(edited)

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April 24th, 2024 13:50

I have this problem also. This issue being fixed would make this monitor a much better and complete product.

(edited)

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April 24th, 2024 16:22

As an avid Alienware/Dell fan, and an owner of this monitor, I'd love to see them lead the pack with a fix on this, seeing as it's effecting all of the Gen 3 QD-OLED displays, but none of the other manufacturers have the scale or influence that Dell/AW does. The AW3225QF being the first/only to fix this will make it a standout product.

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