BenQ UNIVERSAL 144Hz->220Hz OVERCLOCK for 1080p 144 Hz

Talk about overclocking displays at a higher refresh rate. This includes homebrew, 165Hz, QNIX, Catleap, Overlord Tempest, SEIKI displays, certain HDTVs, and other overclockable displays.
nnnn20
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Re: BenQ UNIVERSAL 144Hz->220Hz OVERCLOCK for 1080p 144 Hz

Post by nnnn20 » 28 Jun 2020, 18:58

May I see your 440 Hz CRU screenshot?
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Pretty much any common values can get to 400-500hz, but nothing I change seems to matter either


I don't think this monitor behaves in a very obvious way about the way it glitches. I have tried lots of different resolutions and different horizontal totals/back porch values over the months (even though I didn't do it quite so...scientifically... unless that is what you call trial and error :lol: ), and it does not change the way the monitor glitches at all. After 263-268hz it feels like the scaler simply can't handle it anymore.

I have mostly been using nvidia because that way I can try different values faster, and also because i can create a resolution with an aspect ratio that is independent of the actual active pixels. The highest and more stable overclocks I have managed were using 1080 as the vertical active pixels value (the monitor seems to prefer the native value for vertical), so to get a playable aspect ratio with the highest refresh rate I need to use a "fake" resolution through nvidia. I'm not quite sure what is going on through nvidia's driver when making a resolution this way, but it doesn't seem as laggy as using "GPU scaling" through the panel. If you think CRU could be more appropriate for trying this I could use it for the sake of testing though, perhaps there is a lower resolution with the correct aspect ratio that could work.

The only mode that works properly with overclocking is the "fulllscreen" scaling option, so it is important that the key you press on the S-Switch is set to it. Some lower resolutions can work on aspect and 1:1 sometimes, but overall it is really glitchy. Depending on how exactly you get into the mode, it behaves differently, and the scaling mode and the resolution itself you were using prior to switching also seems to matter. Sometimes they "work" but are actually at 60hz or 120hz (pretty obvious judging from the mouse movement), even if the OSD says otherwise. I think the monitor is programmed to handle some of the default resolutions different from the others. This monitor is technically the revision of the original xl2420t and features a 144hz mode by default, but the scaling options only work up to 120hz (it will go out of range if you try to do video scaling on anything higher than 120hz). I always thought this was odd... Perhaps they knew the scaler was the weak link of the monitor or that it had some firmware bugs and made it so it wasn't possible to use it on 144hz to avoid issues.

Also I took some slightly better pictures in case you are interested

Image
https://i.imgur.com/CZBRQ7i.jpg

500hz is all windows will allow me to try :(

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Re: BenQ UNIVERSAL 144Hz->220Hz OVERCLOCK for 1080p 144 Hz

Post by Chief Blur Buster » 28 Jun 2020, 20:59

nnnn20 wrote:
28 Jun 2020, 18:58
500hz is all windows will allow me to try :(
Thanks for posting and reporting your observations! Even a super-glitchy 500Hz (impractical but non-frameskipping) is still impressive.

Unfortunately, Windows has a 512 Hz limitation:

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You will need to use Linux to attempt overclocking past 512 Hz. You'd need a window manager like kwin-lowlatency. That would be absolutely bonkers though since the panels are not designed to function glitch-free (even at low resolution)

Horizontal scaling and vertical scaling can end up using different processing on some panels, so having full resolution, partial horizontal, may actually be the easiest way to do glitchy-overclock tests.

Real workd gaming would probably be best at no more than ~260Hz-ish.

Impressive for a monitor manufactured in 2013 or 2014!
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zorN
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Re: BenQ UNIVERSAL 144Hz->220Hz OVERCLOCK for 1080p 144 Hz

Post by zorN » 28 Jun 2020, 21:45

@Chief Blur Buster

Heyho, I have a XL2720Z (Displayport) and can't get past 180hz using the CRU settings posted in the guide, when i try to go for 200/210/220 i am just getting a black screen. Some other people posted too that they have 179/180z as a limit. Is there a possible solution to reach the wanted 220hz ?

AlphaRadke
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Re: BenQ UNIVERSAL 144Hz->220Hz OVERCLOCK for 1080p 144 Hz

Post by AlphaRadke » 30 Jun 2020, 11:24

Is that frame skipping?

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Re: BenQ UNIVERSAL 144Hz->220Hz OVERCLOCK for 1080p 144 Hz

Post by Chief Blur Buster » 30 Jun 2020, 11:43

Possibly not, if this is a smartphone camera artifact, as this is not a known quirk of the monitor.

Are you using a smartphone with multiple lens? What model and brand?

It might be a multi-lens smartphone camera compositor that overlays multiple photographs taken briefly apart.

To eliminate this error margin, cover/block all but one lens of your phone (you may need to experiment which lens), or use an app that forces only one lens on the phone, with one contiguous exposure.
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       • Official List of Best Gaming Monitors
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AlphaRadke
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Re: BenQ UNIVERSAL 144Hz->220Hz OVERCLOCK for 1080p 144 Hz

Post by AlphaRadke » 30 Jun 2020, 11:55

Chief Blur Buster wrote:
30 Jun 2020, 11:43
Possibly not, if this is a smartphone camera artifact, as this is not a known quirk of the monitor.

Are you using a smartphone with multiple lens? What model and brand?

It might be a multi-lens smartphone camera compositor that overlays multiple photographs taken briefly apart.

To eliminate this error margin, cover/block all but one lens of your phone (you may need to experiment which lens), or use an app that forces only one lens on the phone, with one contiguous exposure.
Yeah it's a Lenovo a7000 I just thought I should make sure because I have weird very slight and unnoticeable red glitches that appear from time to time after overlocking

Myztek
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Re: BenQ UNIVERSAL 144Hz->220Hz OVERCLOCK for 1080p 144 Hz

Post by Myztek » 05 Jul 2020, 15:50

My friend and I both have a BenQ XL2411P monitor.

We're trying to Overclock it to 180hz ideally, but we're unable to go over 165hz without the screen becoming distorted and freezing.

I noticed that if I turn AMA to "OFF" instead of "High" or "Premium", then I can overclock up to 200hz, but having AMA enabled is important for the purpose gaming and reducing response time.

Has anyone had any experience with this monitor and getting it to overclock to a reasonable Hertz while leaving AMA turned on?

MarkBurghouwt123
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Re: BenQ UNIVERSAL 144Hz->220Hz OVERCLOCK for 1080p 144 Hz

Post by MarkBurghouwt123 » 13 Jul 2020, 12:39

Myztek wrote:
05 Jul 2020, 15:50
My friend and I both have a BenQ XL2411P monitor.

We're trying to Overclock it to 180hz ideally, but we're unable to go over 165hz without the screen becoming distorted and freezing.

I noticed that if I turn AMA to "OFF" instead of "High" or "Premium", then I can overclock up to 200hz, but having AMA enabled is important for the purpose gaming and reducing response time.

Has anyone had any experience with this monitor and getting it to overclock to a reasonable Hertz while leaving AMA turned on?

Hello! I also have this monitor but i have no clue how to get it that high. Mine doesnt go iver 150, and the trick doesnt work because the “activate” application always crashes when i test the resolution. Any tips? How did you do it? should i reinstall the app?

MarkBurghouwt123
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Re: BenQ UNIVERSAL 144Hz->220Hz OVERCLOCK for 1080p 144 Hz

Post by MarkBurghouwt123 » 13 Jul 2020, 12:40

Myztek wrote:
05 Jul 2020, 15:50
My friend and I both have a BenQ XL2411P monitor.

We're trying to Overclock it to 180hz ideally, but we're unable to go over 165hz without the screen becoming distorted and freezing.

I noticed that if I turn AMA to "OFF" instead of "High" or "Premium", then I can overclock up to 200hz, but having AMA enabled is important for the purpose gaming and reducing response time.

Has anyone had any experience with this monitor and getting it to overclock to a reasonable Hertz while leaving AMA turned on?
How did you get to 165?

MarkBurghouwt123
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Re: BenQ UNIVERSAL 144Hz->220Hz OVERCLOCK for 1080p 144 Hz

Post by MarkBurghouwt123 » 13 Jul 2020, 13:28

InvictuSZN wrote:
24 May 2020, 21:12
So uhm.. I managed to get this to work on a XL2411P with Displayport on 210hz on all my resolutions that I play on which are 1440x1080 and 1440x900 as well as normal 1920x1080. One major problem is tho that I am forced to completely turn off AMA which results in noticeable ghosting. Like when Im in 210hz mode and I activate AMA I get really weird artifacts and they go away instantly if I turn it off again. Is there any way I can use AMA? Cuz even at like 180hz it wont let me use it which is rather disappointing. I am using CRU btw and havent messed with Vertical Totals or anthing I just put in my res and put it to LCD reduced and thats it, so maybe thats something i could try? Any help appreciated.
how did you get it to work?

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