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ASUS and Acer UHD G-Sync HDR Monitors Forced to Use Color Compression at 120/144 Hz
We've mentioned the new Ultra HD G-Sync HDR ACER and ASUS monitors a couple of times already. Over the weekend some reported the ACER one got in the news due to a loud ventilator, today more news reaches the web, in high-refresh-rate modes, the displays fall back to color compression.
A few early adopters of these HDR, local dimming monster monitors noticed and reported on Reddit that when using a high refresh rate, the image quality dropped significantly. The story now is that the ASUS and Acer screens make use of color compression at 120 and 144 Hz, not because the panel couldn't handle it, but the main limitation is signal bandwidth over DisplayPort 1.4. This also means you pretty much need to run your Windows desktop at 60 Hz for a bit of a quality readable view.
DisplayPort 1.4 has too little bandwidth available to drive 4k, 144 Hz without compression. To bypass that, the screen monitor signal reverts to 4:2:2 chroma subsampling. basically your brightness information will remain intact, however, the color information will be based on half the resolution, 1920 x 2160 pixels. All is good up to 98 Hz, after that, it's 4:2:2 chroma subsampling ... on your 2500 Euro / 2000 USD Screen. Lovely. There's no real solution for this, other than new display connectors and graphics cards that do support such high bandwidth connections - HDMI 2.1.
chroma subsampling. (Picture: Wikimedia )
VPNFilter malware targets ASUS and DLINK routers now also and injects code into WWW - 06/07/2018 07:13 AM
A week or two ago we reported about VPNFilter malware. A command and control server was recently caught by the FBI, however now it malware appears to target new router types and does so with new feat...
AM4 Motherboards ASUS and Gigabyte Go Online - 02/21/2017 12:48 AM
On the web new photos appeared on several socket AM4 motherboards, this round it is ASUS and Gigabyte (Aorus). There are four models based on the B350 chipset and one with X370....
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Following Asustek Computer's increased investments in the branded desktop industry, Micro-Star International (MSI) also has started developing new own-brand traditional desktops, all-in-one PCs and g...
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Here's something to discuss. Apparently, there are whispers going around that Acer and ASUS could potentially merge. Both of these companies hail from Taiwan, and ASUS Chairman Johnny Shih did respo...
Timothy D Smith
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#5558296 Posted on: 06/18/2018 03:16 PM
I can't believe that the interconnect is the STILL the limiting factor. People are paying tons of money for GPUs and monitors and they are bottlenecked by a cheap cable. I would love to get a 4K, HDR high refresh rate monitor but I will wait.
I can't believe that the interconnect is the STILL the limiting factor. People are paying tons of money for GPUs and monitors and they are bottlenecked by a cheap cable. I would love to get a 4K, HDR high refresh rate monitor but I will wait.
fantaskarsef
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#5558298 Posted on: 06/18/2018 03:20 PM
Early adopter syndrome... this happens when display tech is ahead of other factors (here, connections).
Couldn't USB-C work for this? I don't know the numbers tbh
Early adopter syndrome... this happens when display tech is ahead of other factors (here, connections).
Couldn't USB-C work for this? I don't know the numbers tbh
Agent-A01
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#5558300 Posted on: 06/18/2018 03:21 PM
Didn't they say "visually lossless compression" was supported by 1.4?
Anyways, it's a good idea to skip this generation and wait for DP 1.5 or Gsync with HDMI 2.1 support.
Didn't they say "visually lossless compression" was supported by 1.4?
Anyways, it's a good idea to skip this generation and wait for DP 1.5 or Gsync with HDMI 2.1 support.
Silva
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#5558302 Posted on: 06/18/2018 03:24 PM
I'll wait for a 16:9, 23/24''; Freesync 2 monitor, below 200€. Thank you.
I'll wait for a 16:9, 23/24''; Freesync 2 monitor, below 200€. Thank you.
GameLord
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#5558304 Posted on: 06/18/2018 03:38 PM
422 looks very bad on my UHD TV. Only 444 or RGB is the way to go.
422 looks very bad on my UHD TV. Only 444 or RGB is the way to go.
WhiskeyOmega
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#5558305 Posted on: 06/18/2018 03:39 PM
Its not even a 10bit panel. its an 8bit panel with processing
Its not even a 10bit panel. its an 8bit panel with processing
Agent-A01
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#5558308 Posted on: 06/18/2018 03:42 PM
Yes we all know you want the very best for pennies.
Anyways. There are already Freesync 1 monitors for that price.
Why do you want FS 2? FS2 Adds HDR support and forces manufacturers to use LFC(which you can find on Freesync 1).
Do you think you'll get a high refresh rate with HDR support for cheap?
You'll be waiting a long time, probably indefinitely; even if they were that cheap I can guarantee they would be junk monitors as all are generally at that price point.
I'll wait for a 16:9, 23/24''; Freesync 2 monitor, below 200€. Thank you.
Yes we all know you want the very best for pennies.
Anyways. There are already Freesync 1 monitors for that price.
Why do you want FS 2? FS2 Adds HDR support and forces manufacturers to use LFC(which you can find on Freesync 1).
Do you think you'll get a high refresh rate with HDR support for cheap?
You'll be waiting a long time, probably indefinitely; even if they were that cheap I can guarantee they would be junk monitors as all are generally at that price point.
sammarbella
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#5558312 Posted on: 06/18/2018 03:56 PM
Early adopter syndrome... this happens when display tech is ahead of other factors (here, connections).
Couldn't USB-C work for this? I don't know the numbers tbh
Yes, early adopter syndrome and "smart" hardware manufacturers selling Ferraris without wheels.
USB-C could be a solution but it's another huge mess by itself (get a couple of Tylernol at hand...just in case):
http://blog.fosketts.net/2016/10/29/total-nightmare-usb-c-thunderbolt-3/
https://www.digitaltrends.com/computing/usb-c-implementation-messy-and-unclear/
HDMI is the proper solution for TV and monitors and will arrive not before q3 2018...
Early adopter syndrome... this happens when display tech is ahead of other factors (here, connections).
Couldn't USB-C work for this? I don't know the numbers tbh
Yes, early adopter syndrome and "smart" hardware manufacturers selling Ferraris without wheels.
USB-C could be a solution but it's another huge mess by itself (get a couple of Tylernol at hand...just in case):
http://blog.fosketts.net/2016/10/29/total-nightmare-usb-c-thunderbolt-3/
https://www.digitaltrends.com/computing/usb-c-implementation-messy-and-unclear/
HDMI is the proper solution for TV and monitors and will arrive not before q3 2018...
H83
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#5558314 Posted on: 06/18/2018 04:05 PM
Selling 2500€ monitors with this kind of issues is a very bad joke
Selling 2500€ monitors with this kind of issues is a very bad joke
Brit90
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#5558318 Posted on: 06/18/2018 04:13 PM
Most movies at 4k HDR stream no more than 60Hz, so there is a reason to their madness. I don't agree with what they did, but still - early tech is doing what it said it would.
I am sure the specs mention it as well (although I haven't checked).
Everything is always in the details, but if the specs say 4K HDR @ 144Hz then people will have a case against them.
Most movies at 4k HDR stream no more than 60Hz, so there is a reason to their madness. I don't agree with what they did, but still - early tech is doing what it said it would.
I am sure the specs mention it as well (although I haven't checked).
Everything is always in the details, but if the specs say 4K HDR @ 144Hz then people will have a case against them.
Pale
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#5558321 Posted on: 06/18/2018 04:31 PM
As is mentioned above - isn't the panel actually an 8-bit panel with processing (8-bit+frc)? Doesn't that mean that you actually cannot see the difference between an 8-bit and a 10-bit image on this monitor? If that is the case, DP 1.4 supports up to 4K 120Hz@8-bit. Whereas 10-bit is limited to 98hz, as the article says. But if you cannot see the difference on this panel, due to it being 8-bit+frc, and not true 10-bit, then I was thinking I'd just run it at 120hz, and then leave it at that.
As is mentioned above - isn't the panel actually an 8-bit panel with processing (8-bit+frc)? Doesn't that mean that you actually cannot see the difference between an 8-bit and a 10-bit image on this monitor? If that is the case, DP 1.4 supports up to 4K 120Hz@8-bit. Whereas 10-bit is limited to 98hz, as the article says. But if you cannot see the difference on this panel, due to it being 8-bit+frc, and not true 10-bit, then I was thinking I'd just run it at 120hz, and then leave it at that.
Solfaur
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#5558322 Posted on: 06/18/2018 04:35 PM
It was just a matter of time, I'd be surprised if there won't be more issues.
Selling 2500€ monitors with this kind of issues is a very bad joke
It was just a matter of time, I'd be surprised if there won't be more issues.
FeDaYin
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#5558323 Posted on: 06/18/2018 04:35 PM
4K blurays are 4:2:0, never seen someone being upset about it.
Now 4:2:2 is not enough ?
4K blurays are 4:2:0, never seen someone being upset about it.
Now 4:2:2 is not enough ?
Chess
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#5558333 Posted on: 06/18/2018 05:14 PM
Am I naïve in thinking that... well, just use 2 cables from GPU to monitor?
I get that surround/multimonitor enthousiasts will be left cold in the water, but It'd be a good temporary solution, I think?
I remember that Dell 8K monitor used 2 or even 4 DP cables.
Am I naïve in thinking that... well, just use 2 cables from GPU to monitor?
I get that surround/multimonitor enthousiasts will be left cold in the water, but It'd be a good temporary solution, I think?
I remember that Dell 8K monitor used 2 or even 4 DP cables.
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Did not study HDR yet, but I considered it as simple as another 8bits per pixel which can work as kind of exponent to RGB bits of pixel.
Or HSL expansion where one would need even less additional bits. There are many methods which can easily achieve Very wide HDR range.
I guess they used something more bandwidth hungry.