Author Topic: The Case For 27" 1440p 75hz AHVA/IPS/PLS  (Read 295 times)

NCX

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The Case For 27" 1440p 75hz AHVA/IPS/PLS
« on: March 30, 2019, 05:23:01 pm »
The Case For 27" 1440p 75hz AHVA/IPS/PLS
Work In Progress

TL ; DR: All TN panels have bad image quality, and 27" 2560x1440 75hz AHVA/IPS/PLS offer the best overall gaming and image quality improvement to those with less than 400$ US to spend. Iím arguing for people to upgrade everything instead of sacrificing image quality panel in order to gain 144hz from a low-quality TN panel, of which there are many with worse image quality than the 60hz TN panels people upgrade from.

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« Last Edit: April 04, 2019, 10:09:45 pm by NCX »

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NCX

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« Last Edit: April 04, 2019, 04:44:42 am by NCX »

NCX

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Re: The Case For 27" 1440p 75hz AHVA/IPS/PLS
« Reply #2 on: March 30, 2019, 05:34:20 pm »
TN=Bad Viewing Angles

AOC AG271QG (AUO AHVA):

Source=PRAD

The AOC AG271QG is one of the best 2560x1440 144-165hz monitors with Nvidia G-Sync.  Best Reviewed Flicker Free 144-165hz 1440p Monitors with performance summaries and dozens of review links.
 
AOC AG273QCG (AUO TN):

Source=PRAD

The AG273QCG is a mediocre 2560x1440 144hz AUO TN panel.

Asus VG279Q (AUO AHVA):

Source=PRAD

The Asus VG279Q is the best tested 144hz 1080p monitors.  Best Reviewed Flicker Free 1080p 144hz Monitors with performance summaries and dozens of review links.


ViewSonic VX2458-mhd (AUO TN):

Source=PRAD

The ViewSonic VX2458-mhd is one of the best tested 144hz 1080p AUO TN panels.  Best Reviewed Flicker Free 1080p 144hz Monitors with performance summaries and dozens of review links.
« Last Edit: April 16, 2019, 12:10:15 am by NCX »

NCX

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Re: The Case For 27" 1440p 75hz AHVA/IPS/PLS
« Reply #3 on: March 30, 2019, 05:44:37 pm »
Why AHVA/IPS/PLS?

Multiple good 2560x1440, 75hz AH-IPS and PLS panels with Free-Sync are available for the same price as the cheapest 144hz 1440p TN and curved VA panels. The best tested options are the Acer BE270U, Asus VZ27AQ (second best), Dell S2719DM and Samsung S27H850QFU (best) which is the most accurate, but is not available in North America.

I would be more favorable to the 144hz 1440p VA panels if the curved VA panels had lighter matte coatings and text clarity on par with AHVA/IPS/PLS:

IBXT Curved C24FG70 VA Text Blur Analysis
PC Monitors Curved VA Panel Text Blur Analysis

Also, VA panels have slower pixel response times and suffer from horizontal gamma shift which causes the sides of VA panel to be significantly lighter or washed out compared to AHVA, IPS and PLS panels. VA panel gamma becomes lower, and colors and shades become more washed out the further away from the center.

AOC AG271QG (1440p AUO AHVA Panel):

AOC AG271QG GB Stripes by Dr NCX, on Flickr

Samsung 43NU7100 (Samsung VA Panel):

Samsung 43NU7100 GB Stripes by Dr NCX, on Flickr


I understand that 144hz reduces input lag and motion blur if the panel has pixel response times to match, however I think 144hz is overvalued since skill always trumps non-ridiculous (>40ms) amounts of input lag, plus many of the people who buy the cheapest 144hz 1440p TN panels upgrade from 60hz monitors 75hz provides a 25% refresh rate increase over 60hz, which a noticeable upgrade, and in the case of 75hz AHVA/IPS/PLS, an upgrade which does not require one to sacrifice image quality.

Yes TN panels typically have faster pixel response times than AHVA/IPS/PLS, but they do not have lower input lag than gaming oriented AHVA/IPS/PLS, and as previously stated, 75hz is still a significant upgrade over 60hz. One of the most popular, as well as worst sub 400$ 144hz TN panels, the Dell S2716DG (35%), suffers from vastly more overshoot ghosting than the Samsung S27H850FQU's 5%. Belgium Hardware Source:




« Last Edit: April 11, 2019, 04:25:56 pm by NCX »

NCX

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Re: The Case For 27" 1440p 75hz AHVA/IPS/PLS
« Reply #4 on: March 30, 2019, 05:45:05 pm »
Sitting Directly In Front Is Not A Remedy

All TN panels have very restrictive viewing angles and suffer from vertical gamma shift, therefore all TN panels have bad image quality. AHVA/IPS/PLS panel glow is not a problem if viewed correctly, and not in the dark with the brightness cranked:



Since TN panels suffer from vertical gamma shift, their colors and shades are uneven from top (top quarter is too dark) to bottom (bottom half is washed out), as well tend to have more banding, and always have vastly less wide, or more restrictive viewing angles, though all LCD panel types look the worst when viewed from above, or looked down at.

It does not matter if one sits directly in front of their TN panel (correct way to view a TN), or how much one pays, especially since the majority (excluding Dell S2716DG & S2719DGF) of the most expensive 27" 1440p TN panels use grainier/sparklier matte coatings than AHVA/IPS/PLS panels. Calibration can vastly improve inaccurate TN panels, but a TN is a TN, and all TN suffer from obvious vertical gamma shift.

Dell S2716DG (AUO TN) v BenQ XL2420G (AUO TN) v Qnix QX2710 (Samsung PLS):


Dell S2716DG v BenQ XL2420G v Qnix QX2710 by Dr NCX, on Flickr

Calibrated with an X-Rite i1 display pro colorimeter with ICC profile activated to correct the gamma in 2015.


Acer XB271HU (AUO AHVA) vs Dell S2716DG (AUO TN):


Acer XB271HU vs Dell S2716DG by Dr NCX, on Flickr

Calibrated but connected to a PS4 so there's no gamma correction; both monitors have non-linear and low-ish gamma below the target of linear 2.2


BenQ Zowie RL2460 (AUO TN) vs Qnix QX2710 Multi Hot (AUO AHVA):

BenQ Zowie RL2460 AUO TN vs Qnix QX2710 Multi Hot AUO AHVA by Dr NCX, on Flickr

Calibrated but connected to a PS4 so there's no gamma correction; both monitors have nearly perfectly linear 2.2 gamma and are extremely accurate.
« Last Edit: April 16, 2019, 12:11:31 am by NCX »

NCX

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Re: The Case For 27" 1440p 75hz AHVA/IPS/PLS
« Reply #5 on: April 04, 2019, 04:35:47 am »
Are 27" 1440p TN panels Better? No

I reviewed the Dell S2719DGF (144hz 2560x1440 8 bit AUO TN from 2018) which has better image quality than the S2716DG (144hz 2560x1440 8 bit AUO TN from 2015) , but has worse image quality than the BenQ Zowie RL2460 since it can properly cover SDR (HTDV/REC 709 & sRGB) color spaces while both Dell monitors over and under-saturate colors, as well as can come with low preset gamma (the S2719DGF I tested came with sub 2.0 preset gamma):


e by Dr NCX, on Flickr



BenQ Zowie RL2460 vs Dell S2719DGF Calibrated Color Gamut Comparisons::

BenQ Zowie RL2460 vs Dell S2719DGF Color Gamut Comparison by Dr NCX, on Flickr

The BenQ Zowie (6 bit +FRC AUO TN panel) can fully cover both SDR color spaces (HDTV/REC709 & sRGB) without any under-saturation and only a bit of under-saturation while the Dell S2719DGF significantly over and under-saturates some colors compared to both the HDTV/REC 709 and sRGB color space, and does so significantly more when un-calibrated.  When un-calibrated it significantly over and under-saturates some colors compared to both the HDTV/REC 709 and sRGB color space.  The top left side of the triangle (HDTV/REC 709 color gamut) falls short resulting in the under-saturation of blue and medium to dark greens. Medium to light greens, yellows, oranges and some reds are all over-saturated, a phenomenon typical of AUO panels, including both their 27" 2560x1440 and 32" 3840x2160 AHVA (more balanced or pure) panels which also over-saturate the same colors resulting in green and yellow tints to browns, greys and whites, even after calibration.

Keep in mind that the S2719DGF is calibrated and has its gamma fixed in the below comparison versus being too low out-of-the-box and significantly more washed out.  Click here to see comparisons of the Dell pre-calibration or un-calibrated versus calibrated to see what a unit with low-preset gamma looks like.

1.)  AOC AG271QG (AUO AHVA) versus Dell S2719DGF (AUO TN) calibrated with a Spectracal C6 HDR 2000:

AOC AG271QG vs Dell S2719DGF STALKER CLEAR SKY 2 by Dr NCX, on Flickr


2.) AOC AG271QG (AUO AHVA) versus Dell S2719DGF (AUO TN) calibrated with a Spectracal C6 HDR 2000:

AOC AG271QG vs Dell S2719DGF STALKER CLEAR SKY 1 by Dr NCX, on Flickr


3.) AOC AG271QG (AUO AHVA) versus Dell S2719DGF (AUO TN) calibrated with a Spectracal C6 HDR 2000:
[
AOC AG271QG vs Dell S2719DGF 3 by Dr NCX, on Flickr

« Last Edit: April 11, 2019, 05:26:19 pm by NCX »

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Re: The Case For 27" 1440p 75hz AHVA/IPS/PLS
« Reply #6 on: April 04, 2019, 04:36:07 am »
Banding

Dawn Engine Banding by Dr NCX, on Flickr

AUO TN panels tend to suffer from very obvious and frankly horrific banding when viewing the above Dawn Engine image, as well as when viewing this 60fps Westworld trailer.  These three monitors all suffer from the same obvious banding when displaying the above image

Dawn Engine Banding

Dell S2417DG Banding 2 by Dr NCX, on Flickr
Westworld Banding
Spoiler (hover to show)


The BenQ Zowie RL2460, Dell S2719DGF and ViewSonic VX2458-mhd (all tested by me) are free from very obvious banding when viewing both the Dawn Engine image and Westworld trailer both before and after calibration, but I did see minor banding and compression artifacts not present on my AHVA, IPS and PLS panels when viewing some dark content on the TN panels listed above.  The banding is caused by both the source and the monitors.  If I zoom in very closely to the Dawn Engine image on my ViewSonic VP2780-4K (8 bit +FRC 4K IPS with 14 3D LUT) a tiny bit of banding is preset.  Here are the BenQ Zowie RL2460 and ViewSonic VX2458-mhd

BenQ Zowie RL2460 TN Panel Dawn Engine Lights On
Spoiler (hover to show)


Qnix QX2710 PLS Panel Dawn Engine Lights On
Spoiler (hover to show)


Samsung F2380MX C-PVA Panel Dawn Engine Lights On
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ViewSonic VX2458-mhd TN Panel Dawn Engine Lights On
Spoiler (hover to show)

When the lights are off a bit of banding is visible, especially on the F2380MX which performs the worst despite using a true 8 bit panel, though the banding is only very obvious when viewing the monitor off angle.

None of the monitors mentioned suffer form obvious banding when displaying this screen shot from The Order 1886 which I display and take a photo of every monitor I test

Reddit Posts with banding:
https://www.reddit.com/r/Monitors/comments/9jjcio/24_1080p_144hz_gaming_monitor_without_colorbanding/
https://www.reddit.com/r/Monitors/comments/95t20w/dell_s2417dg_s2716dg_owners_is_color_banding/
« Last Edit: May 14, 2019, 01:08:00 am by NCX »

NCX

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Re: The Case For 27" 1440p 75hz AHVA/IPS/PLS
« Reply #7 on: April 04, 2019, 04:45:44 am »
What About VA Contrast?

Work in progress.