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[Various] ASUS debuts ROG SWIFT PG279Q 144hz IPS and G-SYNC - Page 333

post #3321 of 9409
Quote:
Originally Posted by misiak View Post

Hmmm, you either had a very bad luck or there is rally a problem with QC. Some people stated they have no dead pixel, no dust, only small amount of glow and their are pretty happy with that. No mention about color uniformity issue. This should not happen with IPS technology. This issue was exactly like you described on TN version and main reason I've returned but I would not expect it with IPS! There was also an obvious vertical gama shift where top 1/4 of the monitor was noticeably darker then the rest. But seems also IPS suffer from this!?! One would say this is not an IPS panel smile.gif

In any case, did you have chance to put your hands on XB270HU ? Probably there is not such issue, at least I've never heard it mentioned in reviews. I'm afraid that XB271HU will be the same as most probably it will use same panel as Asus. So really don't know what to do. If it distracts you then my advice is definitely to return it and wait for something better because from my on experience you will always try to convince yourself it is not so bad but it will bother you forever... From now on you will see it every time you turn on the monitor and never get rid of that feeling something is not OK. And as I said, for IPS technology this is just not acceptable.

Yeah, for now I wait for the replacement. Should arrive next week or so.
If it isn't better maybe I'll order a XB270HU or wait for the XB271HU. Deep in my heart I don't want to keep this monitor. It's noticable.
post #3322 of 9409
Quote:
Originally Posted by biosmanager View Post

Yeah, for now I wait for the replacement. Should arrive next week or so.
If it isn't better maybe I'll order a XB270HU or wait for the XB271HU. Deep in my heart I don't want to keep this monitor. It's noticable.

If you have this feeling, definitely get rid of it and try to take XB270HU instead. Because you would need to live with this feeling for the rest of your life (at least until you own this monitor). Because 99% the 271 will have the same panel as 279Q... In any case let us know about your last attempt. Fingers crossed.

Bottom note: I really like the design of Asus, as well as perfect ODS but is this really important in monitor segment ? The image quality should be the top prio in my opinion.
Edited by misiak - 10/24/15 at 2:20am
post #3323 of 9409
As for QC issues, better not get your hopes up. I believe the XB270HU, XB271HU and PG279Q are all quite similar in that area (and everything else related to the panel). If you are having better luck with one or the other than it's just that, luck of the draw.
Quote:
Originally Posted by CallsignVega View Post

2. ULMB brightness has actually decreased from previous IPS-type gaming monitors to a max of 101 cd/m2. That's the wrong direction to go..

How so? From what I see the backlight of the XB270HU is about the same strength as the PG279Q. TFT didn't test the XB270HU at 120Hz but at 100Hz it's a little brighter because it's longer in the "on period". If they would compare both at 120Hz, I am pretty sure that the results would be quite similar. However they do admit that the PG278Q is brighter with the same settings due to a stronger backlight.
Edited by Roelv - 10/24/15 at 2:30am
post #3324 of 9409
Did QC on the Acer XB270HU improve? There are a lot of bad reviews.
post #3325 of 9409
Quote:
Originally Posted by biosmanager View Post

Did QC on the Acer XB270HU improve? There are a lot of bad reviews.

Nobody knows, there are bad but there are also good. At least it seems it does not suffer from this color and luminance uniformity you and other reviews have mentioned. For me is to have better image than eye candy stuff, especially with monitors. I would say the glow will be the same on both. Maybe you could pick also XB270HU and compare with PG279Q and then decide...
post #3326 of 9409
Ok, thx.
The case on the XB270HU looks really cheap. I don't like that glossy look but I would happily switch over to that for a better picture quality.

Seems there is still a long journey ahead of me frown.gif
That whole send back/RMA thing is annoying.
post #3327 of 9409
The stand on the XB270HU is garbage too.
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post #3328 of 9409
PG279Q/XB270HU/XB271HU are all the SAME PANEL! Bottom line is that it's simply a poor panel, hence all the issues that have been seen with it from day one. That's not going to stop. Better QC may prevent some of the worst examples leaving the factory, but that doesn't change the fact that it's highly prone to glow/BLB. Generally, compared to IPS panels that have come before it, it doesn't stand up... apart from it being much faster. I've had several IPS panels over the years, and have always followed the tech... trust me, this is the runt of the litter! IPS should not be getting so much criticism... the faults this panel has are 10 times more widespread and common than I've seen with ANY IPS monitor in history. They seem to have sacrificed almost everything else in favour of getting that extra speed out of it.
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post #3329 of 9409
Quote:
Originally Posted by atomicus View Post

They seem to have sacrificed almost everything else in favour of getting that extra speed out of it.

Yes but this is basically true for any 120+Hz panel. Having some grainy TN panel with overshoot is also a sacrifice. I have already said before, people who are not willing to make these sacrifices should just stick with the quality 60Hz panels. There is no monitor that offers it all and there won't be one for quite some time.
post #3330 of 9409
Quote:
Originally Posted by Roelv View Post

As for QC issues, better not get your hopes up. I believe the XB270HU, XB271HU and PG279Q are all quite similar in that area (and everything else related to the panel). If you are having better luck with one or the other than it's just that, luck of the draw.
How so? From what I see the backlight of the XB270HU is about the same strength as the PG279Q. TFT didn't test the XB270HU at 120Hz but at 100Hz it's a little brighter because it's longer in the "on period". If they would compare both at 120Hz, I am pretty sure that the results would be quite similar. However they do admit that the PG278Q is brighter with the same settings due to a stronger backlight.


And this is the entire cause of the problem.
ULMB does not increase current to the backlight to compensate for the loss of brightness cd/m2 during strobing.
Both Benq blur reduction and lightboost do increase current to the backlight (the original benq blur reduction used much of the same circuitry as lightboost). A strobe persistence of 0.500 ms is actually quite usable with benq blur reduction and is very comfortable to look at on the desktop, although it's hard to game with it unless you're in a pitch black room.

There's no excuse for ULMB not to increase the backlight current. is this some sort of safety feature?
Quote:
As soon as strobed backlight is used, be it for LightBoost or for MBR, the backlight LED current is increased by a factor of about 1.8 in order to compensate, at least partly, for the time the LEDs are turned off between the pulses.

http://display-corner.epfl.ch/index.php/BenQ_XL2411Z

There is a shift in color temperature (I think slightly to the cool side) but I'd "guesstimate" that Benq blur reduction with 0.5ms persistence (at 100hz refresh rate, this is equal to strobe duty =005 without a VT 1500 tweak, and equal to strobe duty 003 with a VT 1500 tweak, as persistence tables for 60hz are used if a VT tweak is active....e.g. 0.167 x 003=0.5 ms, and 0.10ms x 005=0.5 ms.

Brightness 100+blur reduction on+persistence 0.5ms = "about" the same cd/m2 as Brightness 0 + blur reduction off.

For those who use ULMB......how dark is 0.500 persistence (lowest value of strobe width?).
Just how dark is it?
Edited by Falkentyne - 10/24/15 at 3:38am
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