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ACER Predator X34 Owners Club - Page 41

post #401 of 3058
Quote:
Originally Posted by -terabyte- View Post

The problems with the X34 are mainly related to the g-sync module and the overclocked refresh rate. Dell has neither and is a "simple" monitor.

Right, which means it should be possible to fix as it's not a panel fault. I expect Acer will eventually get these issues sorted. At the same time, I don't expect the Asus to ship with these issues. Seems like they held back for a reason.
post #402 of 3058
Quote:
Originally Posted by x3sphere View Post


Right, which means it should be possible to fix as it's not a panel fault. I expect Acer will eventually get these issues sorted. At the same time, I don't expect the Asus to ship with these issues. Seems like they held back for a reason.

 

Let's hope so. Nvidia tunes the g-syn module individually for each panel as far as I know, and since the panels in both monitors are supposed to be the same it is very likely they will have the same issue unless they already implement a fix.

post #403 of 3058
Quote:
Originally Posted by Mikey- View Post

Somebody's going to have to interpret for me what Mountainlifter just said? Whoosh.


Also, Mountainlifter, in your post above you wrote: "... because there are people with perfect monitors out there..."

I'm sceptical of that. I really am. I have a feeling that most people saying they have no lines, can't see the lines. Or they simply don't understand the problem.

As we've already discovered, if your frame-rate matches your frequency, then you're not going to see scanlines. You have to know what the lines look like, and you have to know when they appear. I'm not convinced everyone understands this.

However they should if they've read your posts above. Glad to have you here at the forum.


Not sure if my monitor is "perfect", it has the occasional WFS issue... but I sure can't see the scanlines in the pendulum demo and I tried many fps / Hz combinations... maybe, maybe some faint lines in the grey sky at 40 fps / 100 Hz by sticking my nose on the screen but I'm not even sure (well, I do wear glasses biggrin.gif). By reading other posts it would seem that others can clearly see such lines at arm's length. Maybe I don't understand what to look for but bottom line for me is, if I can't see them even trying to spot them, then they're not disturbing me!

I have a feeling these are linked to some interference, ripple effect or harmonics due to the current feed... but just an opinion not backed up by any facts. And even so it's probably not acceptable if that monitor is so sensitive that it produces such artefacts.

I'm more worried about the WFS issue, it doesn't bother me right now, but we should be told the "hardware cause" by Acer. If it gets worse over time (aging of some capacitor or the like) then I wouldn't want to be in a situation where the monitor bails out two days after the warranty ends. The fact that Acer is "repairing" those not sold yet is not reassuring, it means it might be something we should be worried about. At least we should be told what it is.
post #404 of 3058
Quote:
Originally Posted by Ikarusflug View Post

uhm....no.

We are talking about a 1300 Euro Display...Even for a 200 Euro display this would be unaccepteble.

In a perfect world we have 60Hz 3440x1440 Gsync monitors that will overclock to 100Hz without issue of any kind. And in this perfect world the monitor will cost much less than what it does in the real world.

For most of us, the issue is simply this:

We can't just leave our overclock at 100Hz. We have to match it with the average frame rate of whatever game we're playing. Is this really so difficult to do? I can do this literally in ten seconds. Furthermore, we will never see scan lines as long as our games can reach at least 40 FPS. At 40 FPS and above, we always have a matching frequency that won't produce scan lines.

Personally, I won't buy any game, period, that doesn't run higher than at least 45 FPS on average, so, again, no issue for me personally. I'd say that 95% of my games run at, or above, 60 FPS on my machine.

That said, if you know of a 3440x1440 21:9 IPS panel that has Gsync and overclocks to 100Hz without issue of any kind, and is available for purchase right now, then please let me know.
post #405 of 3058
There are several x34 out there that dont have this issue. Your monitor is broken und you pay 1300$ for it. Ok, your choice.
post #406 of 3058
One thing that is a bit of an issue though:

I don't really mind (too much) having to re-set my overclock all the time. But the damned OSD controls flat out suck. I cannot count the number of times I've accidentally switched the monitor off, or changed the input from display port to HDMI.

That said, I am getting better at it. Still, if I'm going to be using this OSD all the time - and it appears that I am - then a more... uh, friendly interface would've been... appreciated.

I'd like to hear more thoughts from the X34 owners. Are you guys able to control your scan lines by adjusting your over-clock accordingly? Is this something that annoys you greatly? Will you be returning the monitor for this reason?

I'm 99% convinced I'll be keeping mine.
Edited by Mikey- - 11/16/15 at 4:29pm
post #407 of 3058
Quote:
Originally Posted by Mikey- View Post

In a perfect world we have 60Hz 3440x1440 Gsync monitors that will overclock to 100Hz without issue of any kind. And in this perfect world the monitor will cost much less than what it does in the real world.

For most of us, the issue is simply this:

We can't just leave our overclock at 100Hz. We have to match it with the average frame rate of whatever game we're playing. Is this really so difficult to do? I can do this literally in ten seconds. Furthermore, we will never see scan lines as long as our games can reach at least 40 FPS. At 40 FPS and above, we always have a matching frequency that won't produce scan lines.

Personally, I won't buy any game, period, that doesn't run higher than at least 45 FPS on average, so, again, no issue for me personally. I'd say that 95% of my games run at, or above, 60 FPS on my machine.

That said, if you know of a 3440x1440 21:9 IPS panel that has Gsync and overclocks to 100Hz without issue of any kind, and is available for purchase right now, then please let me know.

That doesn't fix anything. Either way, he's definitely right. I need to find an hour off in the afternoon to send mine away.

I haven't been keeping up on the Acer forums the last few days. No word from Acer?
Edited by Smokey the Bear - 11/16/15 at 4:35pm
My System
(16 items)
 
  
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i7-4790k ASUS Maximus Formula VII EVGA 980 ti SLI G.skill Ripjaws X 2133Mhz CAS 9 
Hard DriveCoolingCoolingCooling
Samsung 850 EK Supremacy EVO + Nemesis 280  EK FC-Titan X + RX360 D5 Vario + Bitspower Multi-Z 200 V2 
OSMonitorKeyboardPower
Windows 8.1 64bit Predator x34 Ducky Shine 3 TKL MX Brown w/ Red LED EVGA 1000 P2 
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My System
(16 items)
 
  
CPUMotherboardGraphicsRAM
i7-4790k ASUS Maximus Formula VII EVGA 980 ti SLI G.skill Ripjaws X 2133Mhz CAS 9 
Hard DriveCoolingCoolingCooling
Samsung 850 EK Supremacy EVO + Nemesis 280  EK FC-Titan X + RX360 D5 Vario + Bitspower Multi-Z 200 V2 
OSMonitorKeyboardPower
Windows 8.1 64bit Predator x34 Ducky Shine 3 TKL MX Brown w/ Red LED EVGA 1000 P2 
CaseMouseMouse PadAudio
Corsair 760T Mionix Naos 7000 Corsair MM200 Soundblaster ZXR 
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post #408 of 3058
Quote:
Originally Posted by Smokey the Bear View Post

That doesn't fix anything. Either way, he's definitely right. I need to find an hour off in the afternoon to send mine away.

I haven't been keeping up on the Acer forums the last few days. No word from Acer?

So you ALWAYS have scan lines, no matter what? That's disturbing. Sorry, but I'm getting confused as to who's got what problems. It appears to me that Mountain and I have the exact same issue.

I agree that it's high time Acer acknowledged the scan line issue.

Even if they just say they're investigating. At this point, they just need to say something... anything.


Maybe to insert some positivity into this thread: to those of you just enjoying the monitor... which games are you blown away by on this panel?

The Witcher 3: I'm not going to lie - I tried so hard to like The Witcher 3, but it just didn't happen. The performance on this monitor is through the roof though. This game is wicked smooth with Gsync enabled. And, yes, it looks incredible. I disabled my overclock for this game, and my frame counter never budges from 60. I can't decide if this is just my imagination playing tricks on me or not, but Gsync 60 FPS feels more fluid than Vsync 60 FPS.

Bioshock Infinite: incredible experience at a constant 100 FPS. Just SO fluid.

Watch Dogs: of all my games, this game has been impacted the most by Gsync. This game has gone from being unplayable to being so smooth... even when driving... that I almost can't believe it. I kid you not, to show off what this monitor is capable of, Watch Dogs would be my go-to game.

Right now I'm playing Fallout 4, which I maxed out, god rays and all. I'm constantly shifting between 40 and 60 FPS (again, for this game, my overclock is off). Gsync is saving this game. Everything's nice and smooth. On my old 60Hz fixed frequency monitor I'd be climbing the walls with this game, trying to maintain 60 FPS.

I've had my monitor for just three weeks now, but just the thought of having to go back to my old panel makes me shudder.

Also, looking forward to Assassin's Creed Syndicate on Thursday... just to see what happens.
Edited by Mikey- - 11/16/15 at 7:18pm
post #409 of 3058
Quote:
Originally Posted by Alaindor View Post

Impressive, Mountainlifter.

In your opinion, any influence of an UPS wave form output? Square wave vs. sine wave? Could a square wave output create harmonics and increase ripple?

Using a sine wave form output from my UPS, I see no scan lines.

First let's look at what's happening when a pure Sine wave of amplitude 230V of 50Hz is input the acer adapter: This below image is what is happening.



(on a second oscilloscope)

All the energy of that single Sine wave (230V, 50Hz) has been distributed to many sine waves of many frequencies which when summed up form a DC signal of 19.5V for the most part. But the energy distribution is not perfect and some sine waves that should not have been amplified were and so that results in this nice sawtooth ripple waveform (with fundamental frequency of 6.66Hz) added on top of the pure DC of 19.5V.

The case of trying to visualize what happens when a Square wave (230V, 50Hz) is input to the adapter gets complicated quickly. A square wave itself is made up of the sum of infinitely many sine waves (a fundamental sine of 50hz + harmonic sines at 100Hz, 150Hz... inf) of differing amplitudes. (Fourier series)

We only know concretely how the adapter behaves to a frequency of 50Hz. But my guess is that the higher frequency harmonics of the Square wave (higher multiples of 50Hz) get attenuated by the adapter and we will end up with a squiggly version of the sawtooth waveform in the picture above (+ the DC ofcourse). Nevertheless, the frequency of the new sawtooth output will still be 6.66Hz and it's amplitude will still be around 300mVp-p. So, the ripple amplitude will still be high. (Take this guess with a huge pinch of salt. If I get the time, I'll edit with a better explanation.)

But if it is the case that your adapter is different than what others have been given, then with either a square wave or sine wave input, your Vpp ripple should be low enough not to interfere with the normal monitor operations. So, if I could get the part number of your adapter (pic of the sticker), we can check if we have the same adapter model. It is possible that ACER sent out bulk orders for 19V,7.1A adapters to different manufacturers and one of the manufacturers is creating these crappy adapters with high ripple. Acer only puts their sticker on the adapter.

PS: I wear glasses too. I spoke to two trusted engineers who are also my colleagues who are much more experienced than I am. They are also at a loss to explain how an adapter can have 300mVpp ripple. Once more, this does not mean that the adapter is causing scanlines, only that the adapter is really crappy. Whether Acer engineers designed the monitor electronics around it remains to be seen.
Quote:
Originally Posted by Mikey- View Post

Somebody's going to have to interpret for me what Mountainlifter just said? Whoosh.

However they should if they've read your posts above. Glad to have you here at the forum.

I've put up a picture showing ripple in my writeup. Does that help? Basically, I am saying the power signal is "unclean" and not clean enough for a monitor.

Thanks. I'm glad I could add to the discussion.
Quote:
Originally Posted by Sketchus View Post

Thanks for all the work you're putting into this. Really appreciated.
Thank you!

EDIT: @Mikey- My adapter part number is "ADP 135KB T"
Edited by Mountainlifter - 11/17/15 at 7:06am
post #410 of 3058
So this could potentially be a power brick issue? Should we start posting our part numbers?
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