Acer 390Hz monitor - XV252QF

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fracture
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Re: Acer 390Hz monitor - XV252QF

Post by fracture » 23 Jun 2021, 08:22

any benefit from strobing at 390hz in battlefield 4 @ 1600x1024 ALL LOW -mesh quality ULTRA. = yes there is a benefit, in this game only. HOWEVER, AT the cost of screen tearing.. compared to gsync... Now, I have been using Gsync modules for years ever since the pg279q. I am confident to say that Gsync Compatible modules are never as smooth as the real Gsync module. I know Chief said this once in some older thread but he was not entirely sure. Yes, I am pretty sure that it is deff not as good as the real deal module.. even at 360hz, even at 390hz.

Is this panel better than my Predator x25 360hz ?? or perhaps the Alienware 360hz ? well. Chief made a great point in this thread about how strobing is not optimal when frames would drop below 390hz. I play single player games too, not just Battlefield 4, although that is the only multiplayer game I play and I can get 390+ fps uncapped no problem with the 5800x and 3080.. But is it worth it over the x25 ? is it worth dropping the legit Gsync module at 360hz ? Eh well. Chiefs' points are all valid about how difficult it is to maintain that fps, OUTSIDE of battlefield 4. I know hes right. Even with a top end rig. I would also like to add that when using the Ghosting spaceship test here with the 390hz panel set to 390, if I turn VRB on and then change the hz to 360hz, you can clearly see the clarity of the spaceships degrade. Lower than 360hz ? worse. 240hz ? worse. 144hz ? unbearable. So yeah, Chief pretty much hit the nail on the head here with the photo showing degradation in clarity of the ships.

@ms potatoe Please. What do you think about motion clarity without vrb, ghosting, overshoot?. It appears to have only three overdrive levels.
With which monitors can you compare it?

well ms potatoe, the next level down is of course the x25, alienware 360, and the pg259qn. I have tried all 3 and liked the x25 the most ( best colors + max brightness mode which enables 400nits+, the other two don't have that so they are darker )..

on the 390hz, without VRB? well without VRB or Gsync compatible, you have nothing at all which is just screen tear city when the fps drops lower than 390hz. Like I was saying about gsync compatible though, its just not as smooth as real gsync. Its like.. the short-cutted weak version.....Overdrive works on VRB yes, gsync compatible does not.

@discorz, normal VRB mode 390hz I would say OD1. However, we have to keep in mind that during that ghosting test, its set to 390hz and that fps does not drop during the test. So in game, when the fps drops, it may get a lot worse. Like Chief was saying, hes 100% right about that..

all in all I still have the x25 360hz. Due to these issues here, I may just keep the x25. I have a few more days to fully decide before creating the return rma with acer store. But I am confident that 360hz x25 with real gsync may very much be the best option here.. Also, one more thing about the 390hz is that stand. If you want to pull it closer to your face like a cs go pro, that stand is in the way. Nothing a good ole vesa mount couldn't handle but.. the round stand is big so it has to be back further on the desk.
Last edited by RealNC on 23 Jun 2021, 09:06, edited 1 time in total.
Reason: Merged double post.

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Discorz
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Re: Acer 390Hz monitor - XV252QF

Post by Discorz » 23 Jun 2021, 10:01

Screen tearing at 360Hz shouldn't be a big problem. The higher the refresh rate/fps the less tearing.
Strobing below Hz introduces double imaging, that implies ofcourse. So better not use it if desired framerate is not reached. But there are many old or new games that can consistently keep that framerate.
What we should discuss here is how well tuned it is; overdrive levels/overshoot (within full vrr range)/response times, same for vrb, strobe crosstalk...
Last edited by Discorz on 23 Jun 2021, 16:10, edited 1 time in total.
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fracture
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Re: Acer 390Hz monitor - XV252QF

Post by fracture » 23 Jun 2021, 12:49

right are you basically saying that I might as well JUST run gsync compatible capped @ 397 if anything if I keep this panel then ? Even though screen tearing at 390hz is less.

I will test 390hz w vrr on more and watch for overshoot and test overdrive further. I'm just jumping around with opinions rushing since acer store only allows a 15 day return window. Not really enough time but I will test more. I just want to make the right decision and keep the better panel. Let me know exactly what you want me to check out.

screen tearing at 390hz shouldn't be a problem. but we are talking about battlefield 4 here pretty much all i'm playing so i'm basing my performance analysis off of what I feel in game on all low settings at 1600x1024.

in bf4 I ALWAYS notice screen tearing when the frames drop if gsync is not on. always.
Last edited by RealNC on 23 Jun 2021, 12:57, edited 1 time in total.
Reason: Merged double post.

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Discorz
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Re: Acer 390Hz monitor - XV252QF

Post by Discorz » 23 Jun 2021, 16:47

I'm sure you'll make a good choice yourself.
BF4 works smoother than csgo for me. I'd play it with VRR 384 fps cap since I didn't benefit from 240 or 280Hz strobing (higher the Hz lower the strobing benefit). It felt almost the same as vrr or even strobed vrr.

Still, are you willing to do ufo test?
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fracture
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Re: Acer 390Hz monitor - XV252QF

Post by fracture » 23 Jun 2021, 17:14

I don't have a pursuit camera and if I try it with my phone camera it does not come out right. However, I can tell you after trying it again. With VRR gsync compatible @ 390hz, https://i.ibb.co/K5dGgZP/VRB-OD-0.png your photo here, its better than all 4 of these. The trails behind the spaceships are not there. Also, something to take note of. This panel is Freesync Premium and not regular Freesync. This is basically Gsync Ultimate. Better optimization.. IF you could find a 5700 5800 5900 xt, I bet it would be a little nicer than gsync compatible.

Zace
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Re: Acer 390Hz monitor - XV252QF

Post by Zace » 23 Jun 2021, 18:08

So other than trails behind the ufo is not there, how are the white dots on the ufo are they easier or harder to count compare to the picture? There isn’t any review out there to show the clarity of this 390hz panel, but if its actually as good as you say - Itll probably be the best monitor for esport titles that can reach 390fps.

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Re: Acer 390Hz monitor - XV252QF

Post by Discorz » 23 Jun 2021, 19:23

Its rather easy. Adjust advanced camera settings, use closest shutter speed setting to Hz/4 (1/~100 for 390Hz, 1/90 for 360Hz, 1/60 for 240Hz...), set crispy focus, sync/align that sync track. Goal is to get the most accurate result to real life :) .
For a quick strobe crosstalk preview its better to use fullscreen strobe crosstalk test which would look like this.

These are camera settings for this two pursuit videos: https://ibb.co/XJmr2pf nothing special
strobed: https://youtu.be/DfgvN5H5_T4
non-strobed: https://youtu.be/GuPHCX1EzBw
ofcourse watch at highest quality for better representation!
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Q83Ia7ta
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Re: Acer 390Hz monitor - XV252QF

Post by Q83Ia7ta » 24 Jun 2021, 10:05

Finally 360hz monitors without useless and expensive g-sync have appeared. The main question is how's good overdrive quality is. Great like VG279QM/XF252Q or bad like PG259QN...

fracture
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Re: Acer 390Hz monitor - XV252QF

Post by fracture » 24 Jun 2021, 14:46

I might get an amd card to use freesync on this panel. Now that I have played more battlefield 4 online with it I can see how great it is just due to less ghosting and blur at the higher refresh rate. The problem with gsync compatible is that I am not getting the full vrr range. I have no idea what the range is with gsync compatible.

The overdrive quality was not too much different in ghosting test normal > extreme. However, Overdrive seems to be disabled with VRR it won't let me change it. Out of all of the acer/asus/aorus ect panels I have ever tested Overdrive modes on for years, I can say that this overdrive ont he vg252qf is probably on par with the PG729q's overdrive mode ( not the pg25 which had worse overdrive)… which I would set to extreme and there was no noticeable ghosting or artifacts.

Overall, I am enjoying this panel better than my x25 360hz and have decided to keep.
Last edited by fracture on 24 Jun 2021, 14:57, edited 2 times in total.

fracture
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Re: Acer 390Hz monitor - XV252QF

Post by fracture » 24 Jun 2021, 14:55

Zace wrote:
23 Jun 2021, 18:08
So other than trails behind the ufo is not there, how are the white dots on the ufo are they easier or harder to count compare to the picture? There isn’t any review out there to show the clarity of this 390hz panel, but if its actually as good as you say - Itll probably be the best monitor for esport titles that can reach 390fps.
yes, at 390hz, I can CLEARLY count that there are 3 white windows on each ship in the UFO test with VRB on and EVEN with VRR freesync mode on the ships barely degrade you can still count the windows.

on the 360hz panels, I have tested all 3 acer asus and alienware and could not count the windows in the ghosting test on the ufo's. Instead, at 360hz, they appear as white lines on the ships.

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