Acer 390Hz monitor - XV252QF

Everything about displays and monitors. 120Hz, 144Hz, 240Hz, 4K, 1440p, input lag, display shopping, monitor purchase decisions, compare, versus, debate, and more. Questions? Just ask!
User avatar
Discorz
VIP Member
Posts: 999
Joined: 06 Sep 2019, 02:39
Location: Europe, Croatia
Contact:

Re: Acer 390Hz monitor - XV252QF

Post by Discorz » 24 Jun 2021, 19:05

fracture wrote:
24 Jun 2021, 18:06
also, your 100% sure that just because in CRU it says 390hz max in range, gsync comp is not actually limited ?
It should work like this yes. To check this enable "Refresh Rate Num" in osd and see does it fluctuate inside 360-390Hz range. You would need to get that high framerate to test this.


How many levels of VRB are available? Is it off, normal, medium, extreme?
What settings get disabled with vrb, can brightness be changed?

And some questions for VRB off lol:
Which overdrive level out of 3 is the best for 390Hz and which for 60Hz gaming.
As refresh rate decreases with that best OD for 390Hz, at what point does the overshoot start to appear? at 240, 144Hz? Because its hard to believe there is no overshoot at lower refresh rates.
Compare UFOs | Do you use Blur Reduction? | Smooth Frog | Latency Split Test
Alienware AW2521H, Gigabyte M32Q, Asus VG279QM, Alienware AW2518HF, AOC C24G1, AOC G2790PX, Setup

fracture
Posts: 30
Joined: 22 Jun 2021, 19:29

Re: Acer 390Hz monitor - XV252QF

Post by fracture » 25 Jun 2021, 10:15

The only setting that gets disabled with VRB is freesync. You can change brightness with VRB and VRR it never locks on you. Not sure about which od is best becuase with VRR that is disabled. Honestly with so many more questions you need answered. Those are questions that require answers that could vary between person to person without good software to test the panel with. it's best that you go ahead and order one of these from Acer store today and just test it from here. You have a return period so why not just order it and try it out, ya know? Won't hurt to try it. It's cheap enough at 500 dollars and they ship quick.

I mean the only actual quarrel I have with this panel is the stand but I'm trying Vesa mounts to find a replacement so I can have it closer. Other than that? It deffintely beats 360hz panels due to less blur and possibly even lower input lag ( feels like it while playing online at least but I don't have software like rtings to know for sure)

Zace
Posts: 99
Joined: 23 Jun 2021, 17:58

Re: Acer 390Hz monitor - XV252QF

Post by Zace » 25 Jun 2021, 12:08

Based on the information I read that the acer 390hz has much less motion blur than the 360hz panels. One thing I don’t get is why would acer tune this one much better than the x25. 30hz shouldn’t make big different in reducing blur, so its definitely the tunings in the overdrives.

ms.potatoe
Posts: 44
Joined: 05 Sep 2020, 15:09

Re: Acer 390Hz monitor - XV252QF

Post by ms.potatoe » 25 Jun 2021, 13:13

fracture wrote:
25 Jun 2021, 10:15
The only setting that gets disabled with VRB is freesync. You can change brightness with VRB and VRR it never locks on you. Not sure about which od is best becuase with VRR that is disabled.
I just read about this on other Acer monitors. Here is an answer from Acer about it in their forums:

"Overdrive is enabled by default when your Acer monitor is connected via DisplayPort with FreeSync enabled. This means you will not be able to change Overdrive settings within the monitors On-Screen Display (OSD) menu.
Note: Overdrive can be enabled or disabled if the monitor is connected via HDMI, since FreeSync is not supported via HDMI
."

*OD is activated by default at its optimal value, generally in normal mode.

I guess for compatible Gsync it will be the same.

Tomorrow I should receive mine but I think my Xiaomi Lite 8 can't take long exposure photos.

*my gpu is amd.

ms.potatoe
Posts: 44
Joined: 05 Sep 2020, 15:09

Re: Acer 390Hz monitor - XV252QF

Post by ms.potatoe » 25 Jun 2021, 14:23

Zace wrote:
25 Jun 2021, 12:08
Based on the information I read that the acer 390hz has much less motion blur than the 360hz panels. One thing I don’t get is why would acer tune this one much better than the x25. 30hz shouldn’t make big different in reducing blur, so its definitely the tunings in the overdrives.
In other post a member suggested that nvidia pre-tuned and also restricts big changes in all 360Hz GSync native monitors, maybe Acer own tune is better for fps>350.

fracture
Posts: 30
Joined: 22 Jun 2021, 19:29

Re: Acer 390Hz monitor - XV252QF

Post by fracture » 25 Jun 2021, 14:53

Zace wrote:
25 Jun 2021, 12:08
Based on the information I read that the acer 390hz has much less motion blur than the 360hz panels. One thing I don’t get is why would acer tune this one much better than the x25. 30hz shouldn’t make big different in reducing blur, so its definitely the tunings in the overdrives.
on paper and by mathematical calculations 30hz difference should not make much of a difference. All I know is that in battlefield 4 online, I am playing better and my accuracies are higher using the 390hz panel vs the 360hz panel. It just feels a lot better. I hooked up the x25 played on it for hours, then unplugged it and the 390hz nitro back and I was like wow. I don't know what exactly it is. All I know is that ghosting test on blurbusters does show a much more clear test.

Would an amd card be better to pair with this panel to use Freesync Premium vs Gsync Compatible? would it feel better would screen tearing feel more optimized? that is what I am trying to figure out. Nobody really seems to know that answer yet.

User avatar
Chief Blur Buster
Site Admin
Posts: 11648
Joined: 05 Dec 2013, 15:44
Location: Toronto / Hamilton, Ontario, Canada
Contact:

Re: Acer 390Hz monitor - XV252QF

Post by Chief Blur Buster » 25 Jun 2021, 15:38

fracture wrote:
25 Jun 2021, 14:53
Would an amd card be better to pair with this panel to use Freesync Premium vs Gsync Compatible? would it feel better would screen tearing feel more optimized? that is what I am trying to figure out. Nobody really seems to know that answer yet.
Framerate ranges completely within VRR ranges, will not show tearing. That's one big bonus of a VRR range wider than your framerate range -- consistent VRR behavior that is more esports-friendly.
fracture wrote:
25 Jun 2021, 14:53
Zace wrote:
25 Jun 2021, 12:08
Based on the information I read that the acer 390hz has much less motion blur than the 360hz panels. One thing I don’t get is why would acer tune this one much better than the x25. 30hz shouldn’t make big different in reducing blur, so its definitely the tunings in the overdrives.
on paper and by mathematical calculations 30hz difference should not make much of a difference. All I know is that in battlefield 4 online, I am playing better and my accuracies are higher using the 390hz panel vs the 360hz panel. It just feels a lot better. I hooked up the x25 played on it for hours, then unplugged it and the 390hz nitro back and I was like wow. I don't know what exactly it is. All I know is that ghosting test on blurbusters does show a much more clear test.

Would an amd card be better to pair with this panel to use Freesync Premium vs Gsync Compatible? would it feel better would screen tearing feel more optimized? that is what I am trying to figure out. Nobody really seems to know that answer yet.
Previous 360Hz panels are not optimized to their max, so it's possible that the additional optimizations may have created a larger improvement than 390/360ths -- since 360Hz panels were not yet optimized to their limits, much like early 144Hz panels and early 240Hz panels didn't reach their pinnacle until a few years after.

The opportunity to do 390Hz probably created a second-generation overdrive algorithm for 360Hz. If you compare 360Hz versus 360Hz on the 390Hz, you will probably see 360Hz is a bit clearer on the newer 390Hz monitors probably --
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

Image
Forum Rules wrote:  1. Rule #1: Be Nice. This is published forum rule #1. Even To Newbies & People You Disagree With!
  2. Please report rule violations If you see a post that violates forum rules, then report the post.
  3. ALWAYS respect indie testers here. See how indies are bootstrapping Blur Busters research!

fracture
Posts: 30
Joined: 22 Jun 2021, 19:29

Re: Acer 390Hz monitor - XV252QF

Post by fracture » 25 Jun 2021, 15:45

I see, so there is no benefit going to amd just for freesync2 then, because I'm already in vrr range, got chya.

I did test both panels hooked up using the ghosting test 360hz vs 360hz. It looked ever so slightly cleaner on the 390hz yes, however, at 360hz regardless of the panel, the white windows on the ships appeared with straight white lines. It is only when comparing 360hz to 390hz, the white lines become actual clear windows.

User avatar
Discorz
VIP Member
Posts: 999
Joined: 06 Sep 2019, 02:39
Location: Europe, Croatia
Contact:

Re: Acer 390Hz monitor - XV252QF

Post by Discorz » 25 Jun 2021, 16:13

Im very confused about how many overdrive levels are available with VRB enabled and how many when using freesync/vrr.

earlier fracture said:
fracture wrote:
22 Jun 2021, 19:35
Also, if anyone is wondering if brightness is reduced at 390hz with VRB on, nope! no brightness reduction whatsoever. Unless you use VRB on Extreme.
fracture wrote:
23 Jun 2021, 08:22
...Overdrive works on VRB yes
fracture wrote:
24 Jun 2021, 14:46
However, Overdrive seems to be disabled with VRR it won't let me change it.
fracture wrote:
25 Jun 2021, 10:15
The only setting that gets disabled with VRB is freesync.
Not sure about which od is best becuase with VRR that is disabled.
Now ms.potatoe found new info that overdrive can only be enabled or disabled with freesync.
Btw does this one refer to XV252QF specifically?

So what does this mean?
- VRB off (freesync on) = overdrive off/on
- VRB on = overdrive normal/medium/extreme?

Did I get this right?

So what is this picture then? This is on DisplayPort.
Image
Compare UFOs | Do you use Blur Reduction? | Smooth Frog | Latency Split Test
Alienware AW2521H, Gigabyte M32Q, Asus VG279QM, Alienware AW2518HF, AOC C24G1, AOC G2790PX, Setup

fracture
Posts: 30
Joined: 22 Jun 2021, 19:29

Re: Acer 390Hz monitor - XV252QF

Post by fracture » 25 Jun 2021, 16:33

- VRB off (freesync on) = cannot change overdrive
even at 360hz.


- VRB on = overdrive normal/normal/extreme
at any hz.

Post Reply