Firstly, getting the DyAc models over the non-DyAc models will be the biggest difference. The DyAc verisons have brighter strobing (voltage-boosted strobing), so that's worth the cost premium if you like motion blur reduction modes.
CheekiWeeb wrote: ↑
05 Apr 2020, 00:19
Question 1: How much of a perceivable difference would this 0.5ms vs 1ms GTG be between the XL2546 and XL2746S? I am assuming it is mostly negligible?
See:
GtG Versus MPRT: Frequently Asked Questions about Pixel Response
Head-to-head was done and the difference was noticeable if you hate 240Hz ghosting / 240Hz strobe crosstalk.
While 1ms didn't matter during 60Hz (1/16th of a refresh cycle), 1ms is a much bigger percentage of a 240Hz refresh cycle (1/4th of a refresh cycle). Thanks to the Vicious Cycle Effect (section in the 1000Hz Journey article), higher resolutions and higher refresh rates, amplify GtG limitations.
However, even at these scales, most people don't care or mind 0.5ms vs 1.0ms GtG. However, if you are picky, there are people here that thinks the motion quality improvements of 0.5ms GtG is worthwhile.
Also, the 0.5ms benchmark is mainly at the maximum overdrive setting. What this means is that an un-overdriven panel (that does 0.5ms GtG) may actually have much faster non-overdriven GtG than a panel with 1.0ms GtG.
For example,
-- Panel X might have 0.5ms with maximum overdrive but 2.5ms with less strong overdrive.
-- Panel Y might have 1.0ms with maximum overdrive but 4ms with less strong overdrive.
So with less strong overdrive needed, the differences can actually become somewhat more noticeable, with less ghosting/corona effects as seen at LCD Motion Artifacts 101.
Also, a single GtG number doesn't reveal that there are over 65,000 different GtG numbers for a single 8-bit panel! This is because GtG varies depending on original color and new color. (When a pixel changes color) For example a gray pixel turning black may be slower than a gray pixel turning white. And that dark gray going medium gray might be slower -- than a pixel turning medium gray to light gray.
So, the GtG numbers you see, is merely simply an average GtG. So the 0.5ms vs 1.0ms difference, often, is lurking a bigger upgrade than expected, especially in refresh rate stratospheres. On some older 1ms panels, some specific GtG colors are actually 10 milliseconds (when not using aggressive overdrive).
This is certainly one of those "Blur Busters Milliseconds Matters" topics the sub-millisecond surprises (and becomes human visible). Even 0.25ms GtG versus 0.5ms GtG will still be human visible if/when the refresh rate continues (e.g. 4K 480Hz big screens of the year 2030, for example).
0.5ms GtG means 1 pixel of extra ghosting per 2000 pixels/second. But if you turn down overdrive and the slowest ghosty color GtG becomes 5ms (but still better than 10ms), that's 10 pixels of extra ghosting per 2000 pixels/second (versus a 1ms panel that has a 10ms slow-GtG color!).
But is it worth it? It depends on your eyes. Not everyone is sensitive to tearing. Not everyone is sensitive to stutters. Not everyone is sensitive to lag. It might not matter to you (pleasantly surprised no matter what you get), but it might mean a lot (crushing dissapointing monitor return), or anywhere in between.
-- Do you have 144Hz or 240Hz experience?
-- Are you picky about lag?
-- Are you picky about stutter?
-- Are you picky about tearing?
-- Do you use VSYNC OFF or VSYNC ON or G-SYNC / FreeSync?
-- Are you able to clearly tell TN is superior to IPS/VA panels in motion handling, or do those panels look the same to you in motion blur/ghosting/coronas?
-- Have you been frustrated by ghosting artifacts or corona artifacts?
Answers to the above questions will help me predict whether or not you will be picky about 0.5ms-rated panels versus 1.0ms-rated panels. And to understand how these numbers are measured, see the GtG-vs-MPRT FAQ.
CheekiWeeb wrote: ↑
05 Apr 2020, 00:19
Question 2: Is the XL2746S just a blown up version of the old XL2546 panel with just a slightly better 0.5 vs 1ms GTG time and that dyac vs dyac+ is just a advertisem*nt thing with not much of a big improvement gain? There aren't many reviews out and people don't seem to go into the details of the panel.
Not enough people have tested XL2546 versus XL2746S to tell you. That said, 0.5ms GtG versus 1.0ms is actually something that matters (see above).
The XL2546 like the XL2746S right now I own does not dim when the strobing of dyac is enabled. However, the xl2546 is an older TN panel vs the KD25F which runs the latest AUO TN panel so better response times. The KD25F's aim stabilizer strobe dims the panel. I heard that this was a major deal breaker for some.
CheekiWeeb wrote: ↑
05 Apr 2020, 00:19
Question 3: Is the KD25F's strobe dimming that bad? The KD25F is 400 nits vs the both the XL2546 and XL2746S 350 nits brightness. How far down does the KD25F's strobe technology dim the panel? Can I simulate the brightness scenario with my current benq to see how bad the KD25F's dimming is?
KD25F Aim Stabilizer is dimmer than the DyAc technologies, yes. The BenQ DyAc are among the few strobe technologies (voltage-boosted strobe backlights) that does not dim very significantly.
Meanwhile -- I would very much like to test a XL2746S (I would very much love BenQ to participate in the Blur Busters Approved program later on when COVID-19 settles down).
