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[Official] The Qnix/X-Star 1440p Monitor Club - Page 10

post #91 of 25887
Quote:
Originally Posted by defragger View Post

How did you mange to get it out of test mode dascth?

Not sure if you caught it from before, but I'm not really sure what I did. Opening it up again and just poking around made it work. Who knows. I was guessing maybe routing of wires inside.
post #92 of 25887
Quote:
Originally Posted by apav View Post

Anyone else hear a constant buzzing sound with their QNIX? With my Catleap I could only hear it on bright white pages, now I can pretty much hear it at any time when my house is quiet.

Edit: Okay it's noisier when it's past 100hz, at regular 60hz I can barely hear it anymore. Is that a normal occurrence with you guys?

happens on mine too. Seems to come from the speakers. I posted more details about my experience with the buzzing in the overclock thread. But long story short, unplug your speakers and no more buzzing.
post #93 of 25887
Quote:
Originally Posted by jacer View Post

happens on mine too. Seems to come from the speakers. I posted more details about my experience with the buzzing in the overclock thread. But long story short, unplug your speakers and no more buzzing.

I use Logitech Speakers. I guess you mean I have to open the monitor up to unplug it right? Turning the volume all the way down on the computer's speakers won't do it?
post #94 of 25887
If someone who uses high refresh rates has a moment, could you do this test and see if you see what I see?

Below is a small video file of 40% gray, play it full screen at 60Hz and then again at the highest refresh rate you use. Do you see any difference in the UNIFORMITY of the screen. That is, I don't care if the gray changes shade a bit, that's expected as the gamma shifts at higher rates, but mine gets funny stuff standing out if I use higher refresh rates as seen below:

Video:
40% Gray.zip 18k .zip file

60Hz


120Hz


This isn't backlight bleed, but the inability for some pixel regions to respond at the same speed at these higher rates (or so I guess).
Edited by dascth - 4/24/13 at 7:22am
post #95 of 25887
anyone else notice some burn in on the edge of the screen ?
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Samsung 830 128gb WD Black 1TB Window 8 pro QNIX QX2710 27" 1440p 
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Gaming Rig
(12 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 4770K 4.8GHz  Asus Maximus VI Hero  Sapphire R9 290  G.Skill 16 GB DDR3 1600 MHz 
Hard DriveHard DriveOSMonitor
Samsung 830 128gb WD Black 1TB Window 8 pro QNIX QX2710 27" 1440p 
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post #96 of 25887
Quote:
Originally Posted by dascth View Post

If someone who uses high refresh rates has a moment, could you do this test and see if you see what I see?

Below is a small video file of 40% gray, play it full screen at 60Hz and then again at the highest refresh rate you use. Do you see any difference in the UNIFORMITY of the screen. That is, I don't care if the gray changes shade a bit, that's expected as the gamma shifts at higher rates, but mine gets funny stuff standing out if I use higher refresh rates as seen below:

Video:
40% Gray.zip 18k .zip file

60Hz


120Hz


This isn't backlight bleed, but the inability for some pixel regions to respond at the same speed at these higher rates (or so I guess).

I will test this on all 3 of mine later and I just wanted to note a few things I've found while debezeling.

#1. I believe that there's a "void warranty sticker" on the right bottom of the monitor.
#2. The colorful data cable that attaches onto the monitor had some tape on it but I removed it. I hope it didn't affect anything.
#3. The stand is extremely to remove, thanks to your guide smile.gif
post #97 of 25887
Quote:
Originally Posted by halodude23 View Post

I will test this on all 3 of mine later and I just wanted to note a few things I've found while debezeling.

#1. I believe that there's a "void warranty sticker" on the right bottom of the monitor.
#2. The colorful data cable that attaches onto the monitor had some tape on it but I removed it. I hope it didn't affect anything.
#3. The stand is extremely to remove, thanks to your guide smile.gif

I don't remember seeing a "void warranty" sticker, maybe you could describe its location or take a picture?

The tape is to keep the data cable securely inserted into its socket. Given my problem with test mode due to corrupted video data, I'd say anything that can help prevent it is good. I'm sure it's fine the way it is, but if it freaks out on you, just open it up and ensure it's plugged in and the tape is applied.

I'm glad people are getting use out of my potentially stupid dismantling job. I'm still surprised I wasn't left with a lot of dust in my screen. I carefully wiped it with a microfiber cloth before reassembling the LCD panel itself, but was sure I'd be kicking myself about now after staring at dust all day. Glad it worked out and I got some good videos out of it!
post #98 of 25887
I got the X-Star DP2710 today. It has a cluster of bad subpixels in the top left corner. They are barely noticeable in the 100% (on) state and not at all in the 0% (off) state. However they are quite visible in between these states.
Bad subpixels 590k .JPG file

It does overclock to 120 Hz although I haven't verified that frames haven't been dropped. It also increased gamma to some point above 3, which isn't very nice. 96 Hz landed on gamma 2.5. Does anyone know if overclocking the IPS models result in this shift in gamma?

I also noticed that it uses temporal dithering, which is clearly visible on lower refresh rates (like 24 Hz). So the panels are probably 6-bit.
post #99 of 25887
Quote:
Originally Posted by Zoxc View Post

I got the X-Star DP2710 today. It has a cluster of bad subpixels in the top left corner. They are barely noticeable in the 100% (on) state and not at all in the 0% (off) state. However they are quite visible in between these states.
Bad subpixels 590k .JPG file

It does overclock to 120 Hz although I haven't verified that frames haven't been dropped. It also increased gamma to some point above 3, which isn't very nice. 96 Hz landed on gamma 2.5. Does anyone know if overclocking the IPS models result in this shift in gamma?

I also noticed that it uses temporal dithering, which is clearly visible on lower refresh rates (like 24 Hz). So the panels are probably 6-bit.
I've made some color profiles, aswell one for 120 Hz. You can try it out and see if it's better with that.
You can find them in the OP post, aswell with profiles from other users.

And a 6 bit PLS panel? No, I don't think anyone would do that kind of crap.
Banding would be terrible on such a panel, though you said something about dithering?
The EDID says it's 8 bit per color, why would the panel use 6 bit then and throw away 2560*1440*4*2 bits per refresh? (I don't know wether there's some kind of compression on that data)

About your issue: You could try out: http://www.flexcode.org/lcd2.html
post #100 of 25887
Quote:
Originally Posted by cor35vet View Post

I've made some color profiles, aswell one for 120 Hz. You can try it out and see if it's better with that.
You can find them in the OP post, aswell with profiles from other users.
I have a Spyder 3 so I can correct for it. It does however result in increased posterization. I also got decreased uniformity on higher refresh rates like dascth depicted.
Quote:
Originally Posted by cor35vet View Post

And a 6 bit PLS panel? No, I don't think anyone would do that kind of crap.
Banding would be terrible on such a panel, though you said something about dithering?
The EDID says it's 8 bit per color, why would the panel use 6 bit then and throw away 2560*1440*4*2 bits per refresh? (I don't know wether there's some kind of compression on that data)
6-bit panels + dithering is quite common: http://www.tftcentral.co.uk/news_archive/23.htm#colour_depths
Quote:
Originally Posted by cor35vet View Post

About your issue: You could try out: http://www.flexcode.org/lcd2.html
Probably won't hurt to try...
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