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[Official] BenQ XL2730Z Owner's Club - Page 7

post #61 of 829
I will check out the cross-talk at 120 and 144 Hz to see if it's much of a problem. Although both TFTCentral and PCMonitors didn't see much issue with strobing quality at those frequencies.

Really the big boon of this monitor is that it can do 144 Hz strobing which ULMB doesn't do, it does it brighter AND with faster pulses for better motion clarity plus it's cheaper since you don't need a G-Sync module.
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post #62 of 829
When you get the monitor, test refresh rates under 120hz. You can create custom refresh rates (basically anything from 60 to 129hz with normal timings) or use the preset ones. You will notice that the monitor will not strobe in sync under 120hz. It will stutter and act bizarrely. This will cause blur reduction to be unusable.

At 60hz it strobes at 120hz pulse widths (aka double strobing). Lightboost mode (on the old VG248QE and other monitors you used to de-matte) would also do this but you had to use a VT trick in order to force 60hz double strobe; any VT from 1149 and higher would strobe at 120hz pulses, but the firmware would prevent 120hz strobing at any refresh rate UNDER 120hz (locked for safety) if you used a 1149 VT. It would only enter 120hz lightboost mode at 120hz.

However the VG248QE (and even the Benq T and Z series) did not anticipate people using Vt's *HIGHER* than 1149. Basically any VT in the range of 1149-1180 would enter lightboost 120hz mode, so by experimenting, you could use (if I recall) VT 1179 at 60hz to force 120hz double strobe at 60hz on the VG248QE, and 1155 VT on the Benq monitors to do the same thing (60hz).

You had to use the correct pulse and sync widths or the screen would shut off with a displayport connection (DVI would accept both), e.g. 48, 3 front porch pixels/lines, and 32, 5 sync width pixels/lines and 2080 Horizontal total for 60hz.

Anyway sorry for getting off track here.

The Benq Z monitors would double strobe at 60hz (the same as the lightboost 60hz strobe trick) unless you forced single strobe on in the service menu, then it would single strobe (but the screen would flicker).

The XL2730Z removed the "Single strobe" option along with the scaler change to Realtek, so it would strobe at 120hz pulses at EVERY refresh rate from 60hz-119hz! Thus making blur reduction under 120hz useless frown.gif The older Z series monitors (XL2430T, XL2420G ,XL240Z, XL2411Z and XL2720Z) had a failsafe to keep the strobe in sync with the refresh rate, since the single strobe option was in the service menu, and would revert to the 60hz persistence values if the VT were out of specification (to make sure It would keep the strobe in sync with the refresh rate).

For those of you who still have Lightboost 1080p monitors, if you want to see how buggy the strobing on the XL2730Z is, use a 100hz Lightboost timing and change the default VT for 100hz lightboost (which Is 1138 VT) to a value HIGHER than 1149. 1149 VT signals 120hz lightboost mode (1149 will not enter lightboost mode at 100 hz as the firmware has a safety check for that).

e.g. use VTs in the 1155-1180 range at 100hz.
You should see the monitor enter lightboost mode but be freezing and unfreezing repeatedly--that's what the XL2730Z looks like if you try strobing under 120hz.
Edited by Falkentyne - 9/27/15 at 7:05pm
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post #63 of 829
I completely understand the strobing issues at 119 Hz and below but I won't be using those modes. In my view, the faster the pulses the less amount of flicker/eyestrain and the better the motion clarity. Win/win. 144 Hz or bust! wink.gif

(Although I know the cross-talk is "set" with this display, hopefully it isn't terrible at 144 Hz).
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post #64 of 829
I'm one of those guys that wanted the blur reduction! Chose between the 20z and 30z but opted for the 30z because of better colours and resolution. Not really interested in the adaptive sync stuff since I can maintain a good amount of fps with my games anyway.

Nice to see you here Vega, getting 3 of these and then AG removal? biggrin.gif I agree, the brightness levels on this monitor with strobing on is AWESOME. I used to have a XL2420T and boy, that monitor was too dark on strobing mode.

This panel solved my dizziness on fast paced FPS games by the way, coming from a 60hz IPS. thumb.gif
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post #65 of 829
Quote:
Originally Posted by Lanvin View Post

I'm one of those guys that wanted the blur reduction! Chose between the 20z and 30z but opted for the 30z because of better colours and resolution. Not really interested in the adaptive sync stuff since I can maintain a good amount of fps with my games anyway.

Nice to see you here Vega, getting 3 of these and then AG removal? biggrin.gif I agree, the brightness levels on this monitor with strobing on is AWESOME. I used to have a XL2420T and boy, that monitor was too dark on strobing mode.

This panel solved my dizziness on fast paced FPS games by the way, coming from a 60hz IPS. thumb.gif

If you were only interested in the strobing, the XL2720Z would be a better choice.
The strobing bugs in the XL2730Z are rather serious. It can ONLY strobe at 120 hz and 144hz refresh rates, which is a problem, since you need to keep Framerate=refresh rate at (most) times (ideally, all times) to get the most out of strobing. Strobed LCD's can pick up the tiniest bit of stutter if the framerate drops below the refresh rate.

Due to how CRT's worked and how phosphor fading worked, the stutters were not as obvious or annoying if FPS dropped under refresh rate. Chief blur buster wrote an explanation as to why but I don't remember what he said.

But since you are locked to 120 and 144hz only, this limits the effectiveness of strobing, considerably.
60hz double strobed looks ugly, downright abysmal on the desktop, but does improve 60 fps/60hz games *somewhat* compared to normal 60hz sample-and-hold. But the XL2730Z does not have a single strobe service menu option anymore and strobes at 120hz pulses at any refresh rate under 120hz (even 110hz, 100hz, 90hz, etc) which causes a very uneven and laggy image.

The XL2720Z would have been a much better choice, as you get 60-144hz single strobing at every refresh rate in 1 hz increments, with single strobe enabled in the service menu. You also get the undocumented AMA Low setting that the 24" versions do not have. (Enable blur reduction first then set or re-toggle AMA to high (press back (button #4) if its already on high). The XL2730Z apparently has this also.
Edited by Falkentyne - 9/29/15 at 12:44am
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post #66 of 829
I've been testing the 30Z the last day and I like it. Although I am still up in the air whether I prefer 144 Hz normal "G-Sync" type mode like on the Swift vs strobing at 144 Hz on the 30Z. It does have a bit of cross-talk while strobing so some of the clarity is reduced. At least the "Area" setting allows most of the cross-talk outside of central vision and you can put it at the top and bottom of the display.

The brightness of the strobing on the monitor is very sweet! It seems quite well built and I love the aluminum vertical stand riser. The picture quality is quite impressive for a TN, I'm sure it's 8-bit like TFTCentral and PCMonitors hinted at.

AMA premium is unusable in normal mode, but there isn't much difference between high and premium while strobing. The control puck is a pretty neat feature. I actually like that the headphone holder is also aluminum. The differences in pulse width's doesn't appear to do as much for motion quality as I would have thought. It seem's around a certain threshold, maybe 2ms pulses or lower it doesn't matter as much.

I do like the 144 Hz pulses though for less eyestrain. The AR film is a bit grainy, but I cannot tell if it's identical to the TN Swift without having one next to it. I have noticed that in quite a few games that they are CPU limited once you reach 120+ FPS. Even with a 4.7 GHz 5960X, GPU usage a lot of times drops off. This obviously isn't a good thing while trying to maintain 144+ FPS to stay above the strobing frequency threshold for smoothness. G--Sync is much better suited for that.

Basically this monitor would be superb for AMD users and Freesync. G-Sync of course would lend itself to the TN Swift. For strobing motion clarity, it seems to basically come down to the 30Z with it's brighter, 144 Hz strobing that is harder to "push" with hardware and has more cross-talk for less clarity, or the TN Swift that has 120 Hz ULMB strobing but is quite a bit dimmer, easier to "push" but with less cross-talk.

Coming from a 55" curved 4K OLED the picture quality of these 27" TN panels isn't anything to brag about, but the virtual zero input lag and incredible 144 Hz smoothness sure is sweet.
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post #67 of 829
Vega,
Can you run this test with blur reduction on:

http://www.testufo.com/#test=photo&photo=alien-invasion.png&pps=960&pursuit=0&height=-1

(Try to use 120hz as I think the strobe crosstalk at 144hz covers almost half of the screen).

Then with blur reduction already on, set the AMA to 'high'. Make sure MBR is already on as you will be overwriting the AMA high default parameters. If it's already on high, move it to off/premium then back to high or just highlight the "High" setting then press button #4 instead of button #3.

Does this reduce the overdrive to a "Low" setting? On the XL2720Z, this changes the AMA high to an AMA low setting
(verified by testing on lagom.nl:

http://www.lagom.nl/lcd-test/response_time.php

)

(if it changes all of the inverse overshoot to normal ghosting, then it set it to low).

if it does, check black to white ghosting on a windows background, then lower the contrast to 0 in this mode.
Does this remove all of the "Normal" ghosting on the AMA Low setting?

(this setting can't seem to be activated if blur reduction is off, unfortunately).
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post #68 of 829
Hmm, can't try that right now as I've seem to run into some weird bug. It's like the display is stuck in DP 1.1 speed mode. Can no longer select anything higher than 60 Hz in NVIDIA control panel for 2560x1440.

Swapped DP cables.
Deleted old drivers and reinstalled.
Deleted all monitor drivers/.inf and all entries with CRU.exe.
Either the monitor is telling Win 10 that it is only DP 1.1 speed or Win 10 is confused, even after driver reset/reinstall etc.
Checked for service menu irregularities. None.
Powering down the monitor/unplug and cold shutdown PC, no affect.
A few google results come up with people having the same issue with no resolution.

Most odd!
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post #69 of 829
How long did you unplug the monitor from the wall?
Someone said they fixed it after a 15 minute unplug.
Try pressing the power button while its unplugged from the AC, also.
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post #70 of 829
Hmm, I "reset all" on the display, let it finish flickering, then pulled the power cord out. Seemed to work, back to 144 Hz. lol buggy monitor.
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