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Crossover 44K UHD LED 40 Inch Monitor? - Page 224

post #2231 of 2335
Quote:
Originally Posted by mjoe View Post

another good pwm-free 40-incher.
404k is not "PWM-free", only at higher frequency thumb.gif
post #2232 of 2335
Quote:
Originally Posted by dropadred View Post

404k is not "PWM-free", only at higher frequency thumb.gif

Every single source has called it PWM free, noted its rather high minimum brightness (which makes no sense if PWM was available), and at 0 brightness I don't see double lines in blurbusters' blur trail test. So you might want to back up that claim.

Phillips is known to flicker (PWM) at anything less than 100% brightness, and the AMU 399 also has PWM.
post #2233 of 2335
No, you should maybe to look on it again

PWM modulation is one of the used methods for brightness regulation, as well as the DC regulation (voltage); Term "PWM-free" means it must use DC regulation or it has no regulation at all.

A lot of people are using term "PWM-free" in a wrong way, if there is no flickering (rather it is caused by DC regulation or high-frequency PWM dimming), then it suits for the term "Flicker-free"..

So I have nothing to "back up" if I know, what I am talking about, but if I am wrong, I will happily admit it.

Try ghosting test
https://pcmonitors.info/wp-content/uploads/2015/05/Philips-BDM4065UC-blur.png
you will see the result alike the one in bottom left corner (in bottom right is DC dimming method) and pay attention to correctly identify it.

Till then, my statement will stay unchanged..
post #2234 of 2335
I also think it is high frequency PWM. The fact is that light emitting diode has voltage threshold set in stone, so that the only practical method of lowering LED brightness is PWM. And certainly 240 Hz is something that even forum members with golden eyes can't perceive.

I vaguely remember backlight current oscilloscope images posted here (or on hardforum?) for different samsung models clearly demonstrating difference in quality. I'm unable to locate this URL:-(
post #2235 of 2335
Hey y'all, thanks to everyone who has contributed to this thread. I bought a 404k a few weeks ago based mostly on the feedback and opinions left here, and thanks to you, I got exactly what I wanted, and am loving it. After gaming in 4k, there's no looking back, and those youtube 4k 60 fps videos still blow my mind everytime!
Now, for my problem and question. I got a roku4 on wednesday (launch day) because I was really excited to stream shows and movies in 4k. It came and works great in 1080p, but it won't run in 4k mode because it says the hdmi input port on the tv is not hdcp 2.2 enabled. I tried 4 different hdmi cables, including a brand new rocketfish cable from best buy, certified high speed. Always the same result.
So my thought is, either my 404k is faulty, or the roku is faulty. As a sidenote, when I'm running it as a monitor over DP1.2 from my GTX970, in the nvidia control panel, it says my display is HDCP activated, although it doesn't say what version it recognizes.
I plan to send my roku home with a work friend to have him try it on his brand new sony 4k tv, to see if it is a problem with the roku, but beyond that, I'm not sure what to do.
Has anyone on this thread used their 404k with any hdcp 2.2 source and, if so, what level of success did you have?
post #2236 of 2335
Well got my monitor today smile.gif ... only had a little chance to test it. My initial observations.

- Huge crate with the box inside. No Bubble rap but monitor appeared undamaged in shipping

- Colors appear a bit washed out - will need to check what settings you guys have yours set at and figure out how to change it to english smile.gif

- No dead pixels noticed atm checked briefly smile.gif using DPT (Dead pixel tester) (paid for pixel perfect)

- The power box may have a issue ... well see. Had trouble booting up and heard an electrical sound coming from it. But got it to work.

- Using a DP cable atm also have a hdmi cable (both I purchased off amazon).

- Tested using some movies and some 4k content I dled; also dying light game and my stock program ... My stock charts look Awesome on this. Basically was using a catleap monitor and could have 1 chart open at one time; now I can have 4. So 4 different time frames.

- I didnt notice any lag in dying light but tested only for like 2 mins -

- I notice a slight matte look to the screen; my catleap was glossy and I really liked it that way. I can tell this has a bit of a matte sheen.

- The sides of the monitor tend to look a bit more washed out then the center.

- I Really like the realestate of the monitor just wish I had better colors and the sides wernt as washed out.


I saw the recent discussion about the PWM; well I assumed from reading this didnt use PWM - and the philips did. Thats why I bought this one (I can be prone to headaches). I paid the same price as a philips version (got stuck with a 80pound import tax).

Also can anyone recommend any settings to help with the colors?

Anyone have a picture of what the remote buttons do in english? I cant seem to find it on the forums (I know I saw it somewhere).
or even how to change the language to english.

thanks!
    
CPUMotherboardGraphicsRAM
2700k Asus p8z68-v pro/gen3 6950 1gig 1536 shaders(899/1308)  soon to be 32 gigs of 2133 ripjaw x 
Hard DriveCoolingMonitorPower
256gb M4 crucial SSD, 3 640 aaks WD Corsair H80 (controller problem thou) Soon to be 27" catleap AX850 
Case
Lian-li pc7fnwb 
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CPUMotherboardGraphicsRAM
2700k Asus p8z68-v pro/gen3 6950 1gig 1536 shaders(899/1308)  soon to be 32 gigs of 2133 ripjaw x 
Hard DriveCoolingMonitorPower
256gb M4 crucial SSD, 3 640 aaks WD Corsair H80 (controller problem thou) Soon to be 27" catleap AX850 
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post #2237 of 2335
oh one more question ... I had my catleap monitor running before and when I ran games it filled the whole screen of the 404k. But with my catleap turned off - the screen size of games only run at 1440p (not stretched). How can I make it fill the screen at 1440p just stretching?
    
CPUMotherboardGraphicsRAM
2700k Asus p8z68-v pro/gen3 6950 1gig 1536 shaders(899/1308)  soon to be 32 gigs of 2133 ripjaw x 
Hard DriveCoolingMonitorPower
256gb M4 crucial SSD, 3 640 aaks WD Corsair H80 (controller problem thou) Soon to be 27" catleap AX850 
Case
Lian-li pc7fnwb 
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CPUMotherboardGraphicsRAM
2700k Asus p8z68-v pro/gen3 6950 1gig 1536 shaders(899/1308)  soon to be 32 gigs of 2133 ripjaw x 
Hard DriveCoolingMonitorPower
256gb M4 crucial SSD, 3 640 aaks WD Corsair H80 (controller problem thou) Soon to be 27" catleap AX850 
Case
Lian-li pc7fnwb 
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post #2238 of 2335
Quote:
Originally Posted by djxput View Post

Well got my monitor today :)Anyone have a picture of what the remote buttons do in english? I cant seem to find it on the forums (I know I saw it somewhere).!

Page 142 of this very same thread:
http://www.overclock.net/t/1549360/crossover-44k-uhd-led-40-inch-monitor/1410
post #2239 of 2335
Well have had a little more time to 'fool' with the monitor.

- Got it set to english and have messed around with some settings; increased the hue and saturation - this helped the colors, also increased the red slightly.
(I read through the thread here and saw Grizz's post of what he uses) - not sure if I implemented it right but my monitor looked terrible with it. Curious what others set their monitor at as far as settings.

- There is a slight darkening around the edges of the screen - I think this is with all 40inch monitors; Ive seen various people mention this from various monitors, philips, 420WM etc ...

- This has a semi matte display; I Really like the look of my catleap monitor which is glossy and I 'assumed' this would be similar. But can definitely notice the 'matte' slight grain look. There is definitely misinformation out there about this monitor as far as glossy and matte.
http://www.swiftworld.net/2015/07/28/value-korean-40-4k-monitors-information-and-comparison-of-the-different-brands-and-models/

talks about semi glossy and it being the same as the philips. But when looking at whom I bought it from they list is having a anti glare coating. For some reason from reading the thread I thought this would have a similar display like my catleap. And Im even thinking this monitor differs then the philips as far as screen treatment (glossy vs anti glare).

My point is - I Really prefer glossy now after using my catleap for years. And Im not sure I have any recourse in sending it back (and having them pay for it). Just checked shipping to south korea and it will be expensive and then Ill probably get stuck with the shipping to myself charge and I already paid VAT on top of this (80pounds). So if I just sent the monitor back Id be out 80pounds vat and 120~ for shipping and whatever they paid to ship to me: say 80. So thats 280 just because its not glossy ... or I can resell it (live in london so prob not too hard) or keep it smile.gif

oh one more thing I figured out how to 'stretch the games' NVDA control panel selected gpu for the stretch and that worked.

Didnt notice any lag but will test more and compare to my catleap - btw anyone have any idea what input lag of a catleap monitor iis? Ive looked everywhere and cant find any info.

So to summ up: Like the monitor just wish is was glossy and almost want to return it for a glossy model
    
CPUMotherboardGraphicsRAM
2700k Asus p8z68-v pro/gen3 6950 1gig 1536 shaders(899/1308)  soon to be 32 gigs of 2133 ripjaw x 
Hard DriveCoolingMonitorPower
256gb M4 crucial SSD, 3 640 aaks WD Corsair H80 (controller problem thou) Soon to be 27" catleap AX850 
Case
Lian-li pc7fnwb 
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CPUMotherboardGraphicsRAM
2700k Asus p8z68-v pro/gen3 6950 1gig 1536 shaders(899/1308)  soon to be 32 gigs of 2133 ripjaw x 
Hard DriveCoolingMonitorPower
256gb M4 crucial SSD, 3 640 aaks WD Corsair H80 (controller problem thou) Soon to be 27" catleap AX850 
Case
Lian-li pc7fnwb 
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post #2240 of 2335
I'm not sure there is any agreed on difference between semi-glossy and semi-matte... but both are definitely not equivalent to glossy, since it is a kind of light anti-glare coating, wheras full glossy means no anti glare. Still I'm not sure you can chalk up all the color freckling wierdness to that over the cheap VA panel. All of the 40' monitors are using this panel regardless so the only other option is the IPS monitors (42/49), which are all still semi-glossy.

Outside of that there are 4k TVs which are almost always semi glossy so.... good luck finding a glossy panel at that size.
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