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A product that has been discussed about a lot has got to be the Asus RoG Swift PG27UQ. This NVIDIA GSYNC enabled monitor offers 4K and 144 Hz HDR gaming. We tested the gaming monitor as quickly as we could to see if this screen was worth the very long wait.
Read our review right here.
Review: MSI B450i Gaming PLUS AC - 08/09/2018 01:31 PM
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Review: MSI Radeon RX 570 and 580 MECH 2 8G OC - 08/09/2018 08:59 AM
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Preview: Threadripper 2950X and 2990WX (specs and unboxing) - 08/06/2018 03:01 PM
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Review: MSI B450 Tomahawk - Value At 109 USD - 08/02/2018 08:46 AM
In this review we check some armory from MSI, the B450 Tomahawk, based on the new B450 chipset it is aimed at for Ryzen processors, and in specific the new Ryzen 2000 / Zen+. The new B450 series chi...
Denial
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Senior Member
Posts: 14092
Joined: 2004-05-16
#5572606 Posted on: 08/10/2018 04:53 PM
From a reddit thread where a guy explained it - I don't know enough about it to know whether he is right or not:
What about Display Stream Compression (DSC)?
From a reddit thread where a guy explained it - I don't know enough about it to know whether he is right or not:
You're forgetting the blanking intervals which even digital displays need to sync to the signal. A common 4K timing is 4000x2200 'total pixels' with an active window of 3840x2160, which at 10 bpc ends up 45.62 Gbps. Even at 8 bpc it ends up 38.02 Gbps. Also those blanking intervals are where audio is packed into, so even those monitors that can run on the ragged edge of ultra-tight timings can't provide audio at the same time then.
That 4000x2200 timing at 98Hz would need 25.87 Gbps @ 8bpc, which is EXTREMELY close to the DisplayPort 1.3/1.4 cable limit of 25.92 Gbps (because while the raw interface is 32.40 Gbps there's encoding and protocol overhead to consider), so these monitors are likely using that common 4000x2200 timing.
Regarding DSC latency, DSC only uses a single pixel line buffer (so at 4K you're talking ~4000 pixels total, 3840 to be precise) which is trivial and basically zero latency.
DSC operates entirely in YCbCr, not RGB, and it's more akin to a chroma downscaling technique that spreads it's noise along a linear pixel stream instead of a fixed color plane downscale, so the artifacts are better hidden visually. So there's no such thing as "4:4:4 DSC" for example. There's 4:4:4, 4:2:2, 4:2:0, and DSC, so to speak.
And that's why nobody is discussing the new 4K@144 monitors still supporting 144Hz w/ DSC, because anyone that cares about 4:4:4 precision won't enable DSC because it can still cause artifacting in high detail areas, so the 98Hz limit will most likely still apply.
This is also why you need a dual-cable monitor to do true 4:4:4 4K@120 w/ 10 bpc, because that's the only way to feed enough bits for that many pixels still, even DisplayPort 1.3/1.4 can't do that on a single cable yet.
That 4000x2200 timing at 98Hz would need 25.87 Gbps @ 8bpc, which is EXTREMELY close to the DisplayPort 1.3/1.4 cable limit of 25.92 Gbps (because while the raw interface is 32.40 Gbps there's encoding and protocol overhead to consider), so these monitors are likely using that common 4000x2200 timing.
Regarding DSC latency, DSC only uses a single pixel line buffer (so at 4K you're talking ~4000 pixels total, 3840 to be precise) which is trivial and basically zero latency.
DSC operates entirely in YCbCr, not RGB, and it's more akin to a chroma downscaling technique that spreads it's noise along a linear pixel stream instead of a fixed color plane downscale, so the artifacts are better hidden visually. So there's no such thing as "4:4:4 DSC" for example. There's 4:4:4, 4:2:2, 4:2:0, and DSC, so to speak.
And that's why nobody is discussing the new 4K@144 monitors still supporting 144Hz w/ DSC, because anyone that cares about 4:4:4 precision won't enable DSC because it can still cause artifacting in high detail areas, so the 98Hz limit will most likely still apply.
This is also why you need a dual-cable monitor to do true 4:4:4 4K@120 w/ 10 bpc, because that's the only way to feed enough bits for that many pixels still, even DisplayPort 1.3/1.4 can't do that on a single cable yet.
Lucifer
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Joined: 2013-10-23
Senior Member
Posts: 213
Joined: 2013-10-23
#5572607 Posted on: 08/10/2018 04:58 PM
let's see, 144 Hz with *, 120 Hz with *.
They should've advertised it as 98 Hz monitor and price it alot lower.
As always, overpriced gimmick from asus.
let's see, 144 Hz with *, 120 Hz with *.
They should've advertised it as 98 Hz monitor and price it alot lower.
As always, overpriced gimmick from asus.
Dragam1337
Senior Member
Posts: 5545
Joined: 2017-11-23
Senior Member
Posts: 5545
Joined: 2017-11-23
#5572611 Posted on: 08/10/2018 05:09 PM
The only thing keeping me from buying it, is the fan... i won't ever buy a product with a noisy fan, a monitor least of all.
The only thing keeping me from buying it, is the fan... i won't ever buy a product with a noisy fan, a monitor least of all.
vazup
Senior Member
Posts: 333
Joined: 2013-09-05
Senior Member
Posts: 333
Joined: 2013-09-05
#5572619 Posted on: 08/10/2018 05:45 PM
Is it possible to turn local dimming on while in SDR mode?
Is it possible to turn local dimming on while in SDR mode?
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What about Display Stream Compression (DSC)?