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XL2546 vs. XL2540? Which should I get?

Adjusting BENQ Blur Reduction and DyAc (Dynamic Acceleration) including Blur Busters Strobe Utility. Supports most BenQ/Zowie Z-Series monitors (XL2411, XL2420, XL2720, XL2735, XL2540, XL2546)

Re: XL2546 vs. XL2540? Which should I get?

Postby lexlazootin » 22 Aug 2017, 12:38

The OSD has a DyAc setting which has the options 'OFF', 'High', and 'Premium'.


Does it make it any brighter? Can you turn up the Brightness more when set to Premium or something?

Does it effect the crosstalk or ghosting of the UFO test?

Getting less crosstalk at 240hz is very strange.

The picture settings sound good in standard, most of the settings are just for customization and for making your screen look funkey. You might get some use out of Black Equalizer but i find pretty unnecessary.
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Re: XL2546 vs. XL2540? Which should I get?

Postby drmcninja » 22 Aug 2017, 13:58

lexlazootin wrote:
The OSD has a DyAc setting which has the options 'OFF', 'High', and 'Premium'.


Does it make it any brighter? Can you turn up the Brightness more when set to Premium or something?

Does it effect the crosstalk or ghosting of the UFO test?

Getting less crosstalk at 240hz is very strange.

The picture settings sound good in standard, most of the settings are just for customization and for making your screen look funkey. You might get some use out of Black Equalizer but i find pretty unnecessary.

The brightness seems the same between Premium and High, I can't really tell any difference. There's a bit of crosstalk at the very top and bottom, but they appear similar.

In 100/120/144, the crosstalk at the top and bottom appear way more pronounced and you can see there's a difference between the crosstalk at the top versus at the bottom. In one the image is lagging and in the other it's ahead, if that makes sense.

I think what's happening is that 240Hz is such a high refresh rate, the strobe crosstalk is less visually overlapped giving the illusion of less crosstalk.

Like here's the crosstalk at 120:

|......|

At 144:

|....|

At 240:

|.|

I installed the BenQ strobe utility. I'm not sure whether it starts with the default settings in the monitor or the program's own default? After I change anything, the monitor 'remembers' that as the new profile for 'Premium' or 'High' (Whichever was enabled when I ran the utility). To get back to the original settings, I reset from within monitor's OSD.

So when it says 2.5 persistence and earliest strobe phase, is that the utility's default or the monitor's default?

I can see now that the clearest band is actually a few rows from the top and not in the direct middle. It's right below the dark crosstalk band at the top. I'll try to use the utility to move that around.

Should I try messing with vertical totals? What kind of settings should I use?

From the comments of strobe utility page:

NOTE: Although Blur Busters Strobe Utility doesn’t support all BENQ/Zowie gaming monitors — However, it should be noted that the new 240Hz BENQs such as BENQ XL2540 or BENQ XL2546, both support Vertical Totals of over 2000 during 120Hz operation. In this case, it forces a 120Hz refresh cycle to scanout in 1/240sec. The 240Hz XL2540 (which has a strobe mode accessible via Service Menu) -can go up to approximately ~175-185Hz strobed without too much strobe crosstalk.


In another page, this seemed to explain the entire idea very well:

http://www.blurbusters.com/faq/advanced ... aq/#manual

Which is to use the higher pixel clock capability of the monitor at lower resolution (so, higher VT).

I'll try the 182Hz setting listed there as well.
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Re: XL2546 vs. XL2540? Which should I get?

Postby drmcninja » 22 Aug 2017, 15:15

Man, even V-Sync On with fps uncapped at 240Hz is playable!

It feels smoother than FPS capped to 239 or 238 (which does eliminate input lag).

What was the trick to use V-Sync while avoiding input lag? Make a new resolution at just below 240Hz? Can someone link me to that post/article again?
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Re: XL2546 vs. XL2540? Which should I get?

Postby drmcninja » 22 Aug 2017, 16:34

For anyone else reading:

I'm trying this with 240Hz on the XL2546. I got 240.012 when I set CRU to 240.009. Is this alright or should I aim for even lower/closer to 240Hz?
For low latency v-sync trick
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Re: XL2546 vs. XL2540? Which should I get?

Postby drmcninja » 22 Aug 2017, 18:40

So far my observations:

240Hz with DyAc on is very playable.

182Hz setting from previous link works like a charm, and 182Hz with Fast-Sync and FPS uncapped at 300 in Overwatch also works relatively well, considering it is less than 2x the refresh rate. 240Hz with Fast-Sync and 300 fps is choppy/stutter-y.

I got the refresh rate to 240.012 by setting it to 240.009 (default was 239.76 IIRC). OSD says it's at 241 Hz. Vsynctester and Blur busters' utilities confirm 240.012. I set V-Sync on and FPS capped in-game at 240 and it works. It just feels and looks smoother at 240Hz than even 182Hz.

I haven't tinkered with the strobe utility yet too much. I couldn't notice a huge difference in crosstalk or clarity between different persistence settings at 240Hz.

The Overdrive seems a little "strong", but AMA is only set to 'High'.

I'm keeping DyAc off for regular Windows desktop use.

The included color modes (FPS 1, 2, etc) make no sense to me. FPS mode washes out all the colors like crazy.

Edit: I turned the Brightness down to 55. It's just as bright with or without DyAc enabled. Maybe I'll turn it up to 60, but it feels too bright at anything over 75.
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Re: XL2546 vs. XL2540? Which should I get?

Postby davidjo » 29 Aug 2017, 08:50

Which one should I But? Purely for csgo.
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Re: XL2546 vs. XL2540? Which should I get?

Postby Chief Blur Buster » 29 Aug 2017, 17:30

davidjo wrote:Which one should I But? Purely for csgo.

I'd get the XL2546. Both support the same features (even strobe on/off), except the XL2546 seems to be better all around, with improvements including brightness.
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Re: XL2546 vs. XL2540? Which should I get?

Postby davidjo » 29 Aug 2017, 19:13

Chief Blur Buster wrote:
davidjo wrote:Which one should I But? Purely for csgo.

I'd get the XL2546. Both support the same features (even strobe on/off), except the XL2546 seems to be better all around, with improvements including brightness.


Thanks Chief!

what improvements are these?
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Re: XL2546 vs. XL2540? Which should I get?

Postby Chief Blur Buster » 29 Aug 2017, 23:28

There's been several reports where there seems to be no downgrade from XL2540, but little upgrades (e.g. brightness).

The main advantage is probably improved strobe mode brightness, but you might not end up using the strobe mode if you don't plan to use it for CS:GO. In which case, if you don't care about strobing, then $150 is certainly a steep price difference. You will have to decide. The XL2540 certainly is also a legitimate choice, too.

Both the XL2540/XL2546 are wonderful CS:GO displays.
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Re: XL2546 vs. XL2540? Which should I get?

Postby davidjo » 30 Aug 2017, 00:01

Is the strobe mode the dyac? Does strobe increase input lag?
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