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[Official] The Qnix/X-Star 1440p Monitor Club - Page 649

post #6481 of 25891
So lowering the pixel clock will fix both these problems?
post #6482 of 25891
Quote:
Originally Posted by UrbanToast View Post

So lowering the pixel clock will fix both these problems?

Yes. Find Spartan's posts, he's written it up brilliantly and if that doesn't help come back an ask.

It's a long and boring process, like most OCing, so give it an hour at least.
post #6483 of 25891
Quote:
Originally Posted by UrbanToast View Post

So lowering the pixel clock will fix both these problems?
Yes, lowering it by adjusting the other numbers. This monitor uses the EP269 display controller which is capable of a 450MHz pixel clock natively. This implies that keeping pixel clock at or below that would reduce / eliminate the side effects of overclocking this monitor (far). Spartan F8 has gotten to ~459MHz @ 120Hz, which is technically a ~2% overclock, considering the capabilities of the display controller.
post #6484 of 25891
Quote:
Originally Posted by UrbanToast View Post

So lowering the pixel clock will fix both these problems?

Read pages 646 and 647 and you will find some stuff to try, its not your exact problem but worth a shot.
post #6485 of 25891
I have read his posts and have a fairly good understanding now. i was in the process of lowering the pixel clock and got it to this point which was stable just wasn't sure if these side effects would completely go away with more tweaking. I will keep going lower and see how it goes. Overall i'm loving this monitor, the fact it's overclockable without buying a marked up version like the catleaps is awesome. Thanks for the help.
post #6486 of 25891
I just got my Qnix 2710 (matte) in the mail.

Its contrast measured in at 410:1
About 100cd/m^2 brightness and 0.23cd/m^2 black

This is crap. It's worse than the nearly 4 year old TN monitors I have right now.
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post #6487 of 25891
Quote:
Originally Posted by geoxile View Post

I just got my Qnix 2710 (matte) in the mail.

Its contrast measured in at 410:1
About 100cd/m^2 brightness and 0.23cd/m^2 black

This is crap. It's worse than the nearly 4 year old TN monitors I have right now.

I take it those measurements were post-calibration? What contrast ratio were you expecting at that low of brightness? Plus, I don't think the spec they give of 1000:1 is accurate for the matte versions. They have the same spec for glossy and they are the exact same panel.
post #6488 of 25891
Quote:
Originally Posted by Xentar712 View Post

I take it those measurements were post-calibration? What contrast ratio were you expecting at that low of brightness? Plus, I don't think the spec they give of 1000:1 is accurate for the matte versions. They have the same spec for glossy and they are the exact same panel.

Yes post-calibration, and I expected at least 800:1. My 24" TN's contrast measures around 600:1 and my secondary TN measures 600:1 to 700:1.

Also, panels tend to have similar contrast ratios across different brightness levels so it shouldn't really matter that the brightness is low; the black levels should drop relative to the maximum brightness. I was expecting some backlight bleed or a few dead pixels or something, but not this.
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post #6489 of 25891
Quote:
Originally Posted by geoxile View Post

Yes post-calibration, and I expected at least 800:1. My 24" TN's contrast measures around 600:1 and my secondary TN measures 600:1 to 700:1.

Also, panels tend to have similar contrast ratios across different brightness levels so it shouldn't really matter that the brightness is low; the black levels should drop relative to the maximum brightness. I was expecting some backlight bleed or a few dead pixels or something, but not this.

Try a higher brightness around 200cd/m^2 and see what you get. It will probably give you better results. If you do, please let me know - I'm curious myself. I think these screens react more harshly at different brightness levels than TN panels do. My contrast ratio on my other IPS screen dropped from 600:1 to under 300:1 when going from 200 to 100 cd/m^2. anandtech has also shown reviews with similar results on other IPS screens. I realize this is PLS but it's really not that different. I personally keep my brightness cranked up on my model to cut down on the glare. Took a while to get used to that brightness though. I haven't measured my levels yet because my colorimeter is on loan, but it looks better than when the screen is dim.
post #6490 of 25891
Quote:
Originally Posted by Xentar712 View Post

Try a higher brightness around 200cd/m^2 and see what you get. It will probably give you better results. If you do, please let me know - I'm curious myself. I think these screens react more harshly at different brightness levels than TN panels do. My contrast ratio on my other IPS screen dropped from 600:1 to under 300:1 when going from 200 to 100 cd/m^2. anandtech has also shown reviews with similar results on other IPS screens. I realize this is PLS but it's really not that different. I personally keep my brightness cranked up on my model to cut down on the glare. Took a while to get used to that brightness though. I haven't measured my levels yet because my colorimeter is on loan, but it looks better than when the screen is dim.

http://www.tftcentral.co.uk/reviews/dell_u2713hm.htm
IPS panels shouldn't be different from TN panels. I think it has more to do with the nature of LED (backlighting) than it has to do with the actual panel type. Also, I can't really use a higher brightness. I keep my room fairly dark and 100cd/m^2 is the best for me. Even in an office environment 200cd/m^2 would be way too bright for me.

Edit: There is also a weird glow coming off of the monitor. I would think it was IPS glow but I can still (sort of) see it from a distance of a several feet facing the monitor directly. If it's IPS glow it's the worst I've seen short of a defective monitor I've had.
Edited by geoxile - 9/5/13 at 12:07pm
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