NEW Benq Zowie Monitors Speculation/Info Thread (XL2546K-B, XL2546K, XL2411K)

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Re: NEW Benq Zowie Monitors Speculation/Info Thread (XL2546K-B, XL2546K, XL2411K)

Post by Discorz » 31 Oct 2022, 02:41

They sure could use more strict/demanding team of testers over there. It can only improve the experience.
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Re: NEW Benq Zowie Monitors Speculation/Info Thread (XL2546K-B, XL2546K, XL2411K)

Post by evmadic » 05 Nov 2022, 04:34

Anyone know if a 1080 ti with the nvidia firmware update (making it displayport 1.3/1.4 capable) can run 360-500hz in 1080p?

I've only ever ran my 1080 ti on my Zowie 240hz xl2546 (displayport 1.2). I'm reading that the firmware update was more for people that wanted to run 4k @144hz.
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Re: NEW Benq Zowie Monitors Speculation/Info Thread (XL2546K-B, XL2546K, XL2411K)

Post by A Solid lad » 05 Nov 2022, 06:36

evmadic wrote:
05 Nov 2022, 04:34
Anyone know if a 1080 ti with the nvidia firmware update (making it displayport 1.3/1.4 capable) can run 360-500hz in 1080p?

I've only ever ran my 1080 ti on my Zowie 240hz xl2546 (displayport 1.2). I'm reading that the firmware update was more for people that wanted to run 4k @144hz.
Good question.
I've just read up on this, and a reddit comment mentioned that during this process, your GPU will switch from using EDID to DisplayID... which I assume will break ToastyX's CRU's functionality, since that relies on modifying the EDID?

Someone more knowledgeable than me should chime in and clarify. lol
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Re: NEW Benq Zowie Monitors Speculation/Info Thread (XL2546K-B, XL2546K, XL2411K)

Post by Chief Blur Buster » 06 Nov 2022, 03:19

A Solid lad wrote:
05 Nov 2022, 06:36
Good question.
I've just read up on this, and a reddit comment mentioned that during this process, your GPU will switch from using EDID to DisplayID... which I assume will break ToastyX's CRU's functionality, since that relies on modifying the EDID?
ToastyX already supports DisplayID for the last while, via the Extension Block feature.
toastyx.png
toastyx.png (36.62 KiB) Viewed 11287 times

But try the detailed CEA-861 resolution (E-EDID) first instead, see if that works.
Detailed resolutions support higher refresh rates without problem, the limit is cable bandwidth.
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Re: NEW Benq Zowie Monitors Speculation/Info Thread (XL2546K-B, XL2546K, XL2411K)

Post by A Solid lad » 06 Nov 2022, 13:44

Ah yes, the reply I was hoping for :D
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Re: NEW Benq Zowie Monitors Speculation/Info Thread (XL2546K-B, XL2546K, XL2411K)

Post by evmadic » 08 Nov 2022, 06:41

Chief Blur Buster wrote:
06 Nov 2022, 03:19
Detailed resolutions support higher refresh rates without problem, the limit is cable bandwidth.
Thanks for this. I just got confused because I used that linus calculator to add the values for 500hz:
https://linustechtips.com/topic/729232- ... mulas=show

DisplayPort 1.4 has a maximum bandwidth of 32.4Gbps. With a Timing Format of CVT-R2, this is enough for up 480hz (31.96Gbps) at 1080p.
But 1920x1080 @500hz comes in just above at 33.67Gbps.

However, even on Asus's website, they list the connector for the 500hz monitor as DisplayPort 1.4: https://www.asus.com/news/qj17frkzdvjcc9tz/

I'm assuming it will probably come with a special cable that supports that extra bit of bandwidth needed to hit 500hz on 1080p.
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Re: NEW Benq Zowie Monitors Speculation/Info Thread (XL2546K-B, XL2546K, XL2411K)

Post by Chief Blur Buster » 08 Nov 2022, 17:41

The LinusTechTips calculator is great quick-calculate tool but it doesn't include non-standard EDID formulas.

You can get even smaller than CVT-R2 by using a custom non-VESA Manual timing, or doing things like DSC or 6bpc or 4:2:0 chroma.

CVT-R2 requires 3520 pixels Horizontal Total and 1525 Vertical Total.

However, 3440x1440 can be made to work with 3443 pixel Horizontal Total and a 1443 Vertical Total (1 pixel for all porches and sync). The porches and sync are literally just comma separators when it comes to digital displays, but we use giant analog-like numbers, inefficient blankings that you can drive a truck through.

That is only 4968249 pixels per refresh cycle, rather than 5368000 pixels per refresh cycles (including offscreen/overscan pixels in blanking intervals). This would push it below that bitrate budget.

Likewise, there are additional tricks like using YUV 4:2:0 (16bit per pixel instead of 24bit per pixel), or by using DSC, or by using 6bpc RGB (18bit per pixel instead of 24bit per pixel). This reduces bandwidth enough to increase refresh rate more.

Likewise, QFT (Quick Frame Transport) is a non-VESA formula too.

Interesting history: That's why bog standard 1080i and 1080p is 2200 pixels wide by 1125 pixels tall at the signal level, to preserve 1:1 temporal convertibility to analog high-definition for an analog CRT tube. That's why cheap HDMI-to-VGA and VGA-to-HDMI converters use unbuffered DACs except for the purpose of buffering a few HDMI packets (typically a scanline or few). In fact, it converts straight to a 1980s Japanese analog CRT HDTV tube. The cards still capable of interlace today, can still drive a 1986 MUSE prototype Japanese HDTV tube with the current EDID timings with interlaced forced on, once undergone appropriate signal conversion -- no temporal changes is necessary to the signal! And current 4K 60Hz EDID just doubles it up to 4400 pixel HT and 2250 pixel VT, a direct descendant of a 1980s japanese HD spec. BTW, a blanking interval also existed in a 1920s Biard/Farnsworth television driven by a mechanical Nipikow wheel. We've stuck to the same signal topology at this raster scan line delivery layer for a century, and these vestigals survived through the analog-to-digital transition.
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Re: NEW Benq Zowie Monitors Speculation/Info Thread (XL2546K-B, XL2546K, XL2411K)

Post by A Solid lad » 09 Nov 2022, 19:34

Chief Blur Buster wrote:
08 Nov 2022, 17:41
Interesting history: That's why bog standard 1080i and 1080p is 2200 pixels wide by 1125 pixels tall at the signal level, to preserve 1:1 temporal convertibility to analog high-definition for an analog CRT tube. That's why cheap HDMI-to-VGA and VGA-to-HDMI converters use unbuffered DACs except for the purpose of buffering a few HDMI packets (typically a scanline or few). In fact, it converts straight to a 1980s Japanese analog CRT HDTV tube. The cards still capable of interlace today, can still drive a 1986 MUSE prototype Japanese HDTV tube with the current EDID timings with interlaced forced on, once undergone appropriate signal conversion -- no temporal changes is necessary to the signal! And current 4K 60Hz EDID just doubles it up to 4400 pixel HT and 2250 pixel VT, a direct descendant of a 1980s japanese HD spec. BTW, a blanking interval also existed in a 1920s Biard/Farnsworth television driven by a mechanical Nipikow wheel. We've stuck to the same signal topology at this raster scan line delivery layer for a century, and these vestigals survived through the analog-to-digital transition.
I love reading these tidbits.
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Re: NEW Benq Zowie Monitors Speculation/Info Thread (XL2546K-B, XL2546K, XL2411K)

Post by evmadic » 10 Nov 2022, 13:05

Chief Blur Buster wrote:
08 Nov 2022, 17:41
You can get even smaller than CVT-R2 by using a custom non-VESA Manual timing, or doing things like DSC or 6bpc or 4:2:0 chroma.
I just noticed that the new ASUS PG27AQN 27" 1440p @360hz display is DisplayPort 1.4 DSC.
So yea most likely the 500hz display will be the same.
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