Acer 390Hz monitor - XV252QF

[axaro1]

guys, any differens between aopen and nitro?

The OSD is the same, panel performance looks the same, same stand/materials.

The Aopen seems to be identical to the Acer Nitro except for the fact that VRB is Acer trademark for strobing tech so it's called TVR on the Aopen.

[lyrill]

guys, any differens between aopen and nitro?

aren't they all just acer, but like sub branch brands for different regions?

[dqniel]

I’ve been using the monitor for a couple weeks now and to be honest I’m somewhat disappointed. With the strobing on extreme it’s very dim. I kind of wish I had gone with a Zowie XL2546K or the viewsonic xg2431. I thought my 11900k and 3070 would get me enough frames in csgo on 1080p to make the monitor worthwhile but I usually can’t hit over upper 200’s unless I’m in 4:3.

Maybe I just need to give it some more time and try the strobing extreme more and get used to it. and maybe try to find one of these 3rd party brightness programs. can anyone recommend one? I already keep the ingame brightness maxed out.

Are you strobing at 390hz with sub 200 fps? If that's the case not using VRB will achieve much better results.
I would personally avoid 390hz strobing if I can't achieve 300+ fps, in the few games where I can hit 390fps consistently it surely provides a great gaming experience.

In games where I can achieve 200~300 fps I just create a custom resolution at 240hz with 1950VT, 11/13 Crosstalk Test lines show no visible crosstalk, ufotests look like this: https://i.imgur.com/PHPjant.jpg

Both the XG2431 and 2546K are great monitors, the XG2431 with Color Profile set to Native + Ultra Fast OD can achieve non-gamma corrected Total Response times in the 4.0ms range which paired with strobing should be able to match or even beat the 2546K (+ it should have less crosstalk), it also costs less. If you are considering either one of these two monitors I'd go with the Viewsonic.

I didn't try the XG2431 so I can't make any first hand comparison but I do prefer the Acer at 240hz with 1950VT compared to the Benq at the same refresh rate (also with tweaked Vertical Totals https://i.imgur.com/GAwdyS0.png), the Zowie is still slightly better in terms of clarity but the Acer is a step ahead in terms of crosstalk, overdrive artifacts and it feels more responsive (which is to be expected with -150hz of headroom to tweak QFT).

I know this post is old but I have an XV252Q and I'm curious to know your process for setting custom vertical totals? I'd like to mimic your best 240hz strobe settings that you used for this monitor

Your UFO image looks great for it.

[axaro1]

I know this post is old but I have an XV252Q and I'm curious to know your process for setting custom vertical totals? I'd like to mimic your best 240hz strobe settings that you used for this monitor

Your UFO image looks great for it.

First of all, set your refresh rate to a value different from 240hz or you will not be able to create a custom resolution at the same refresh rate that you are using

NVCP -> Display -> Customize -> Create New Custom Resolution -> Change Timings Standard: Automatic to Manual -> now you can access greyed out timings, Set Total Pixels under Vertical to 1950 and change refresh rate on top to 240hz.

Some things to keep in mind: You cannot use Gsync/Freesync with these timings at 240hz (it's better to use 390hz with VRR anyway), to use VRR techs you need slightly lower Vertical Totals values. For example at 390hz with 1200VT (compared to stock 1100) you won't be able to use Gsync, lowering VT to 1175/1150 will make VRR works.

[axaro1]

Inspired by this video from Techless where he shows that OD Normal with Freesync is slightly slower than without Freesync I was wondering if this was also true for OD Extreme at 390hz.

it is indeed possible to run slower OD Normal/OD Extreme, which can also be paired with VRB, this is useful to make custom 240hz resolution run with OD Normal with less overshoot and to run 390hz OD Extreme with less overshoot.

As described by Discorz in the first page of this thread (I assume that it might also be possible to achieve it with AMD gpus if you remove the freesync extension block with CRU) it is possible to use overdrives when Freesync is ON in specific conditions.

With an Nvidia setup all you need to do is (1) enable Freesync in the monitor OSD, (2) disable G-Sync Compatible in the Nvidia Control Panel and now you'll be able to use custom overdrives with Freesync ON, without Freesync/Gsync actually being used (If you do not disable G-Sync compatible in NVCP, overdrives will still be greyed out and VRB/Freesync will be mutually exclusive).

Just like in Techless video, the difference is subtle but when testing at 390hz with Smoothfrog and VRB Extreme OD Extreme with Freesync ON vs OFF at high speed (7/8 px/frame) you can see that pixel transitions such as Green to 191 and 127 background have less color inversion afterimage due to OD Extreme having a less aggressive overdrive.

This is also true with 240hz OD Normal, providing less overshoot than without Freesync overdrive scaling.

Please note: I also found out that enabling VRB in the OSD can sometime disable Freesync even if you follow (1) and (2) steps but if you bind VRB to an Hot Key Assignment it will not disable Freesync (???) so play around with that if you have issues, sometimes it works with OSD and sometimes it does not unless you use an Hot Key assignment, but that's to be expected since this trick is basically using a firmware bug.

Thanks to Acer for making the most buggy OSD I've seen to date.

Example of VRB disabling Freesync and Hot-Key VRB circumventing this issue.

phpBB [video]

TL;DR: OSD bug related to Freesync can force Overdrives to run with a less aggressive voltage without VRR actually being used, minimal difference but small QOL improvement for people who have been running 390hz OD Extreme or 240hz OD Normal, can also be paired with strobing (^see video^)

[Chief Blur Buster]

Friendly informative notice for other forum readers who keep confusing VRR and VRB terminologies.

VRR = Variable Refresh Rate (FreeSync)
VRB = Visual Response Boost

For ACER monitors you can't hack-enable VRR (FreeSync) and VRB (strobing) at the same time on this model (AFAIK).
Unlike some models of Gigabyte and ASUS, currently Acer does not appear to be officially supporting VRR+VRB concurrently at the moment on this specific model.

[Blizz]

The AOPEN rebrand is on sale for $300 at Microcenter with shipping available

https://www.microcenter.com/product/638 ... toreid=029

[DPRTMELR]

it is indeed possible to run slower OD Normal/OD Extreme, which can also be paired with VRB, this is useful to make custom 240hz resolution run with OD Normal with less overshoot and to run 390hz OD Extreme with less overshoot.

I don't get your post completely. So you are saying monitor freesync on nvcp off is better right? Or is there other ways to achieve 390hz od extreme with less overshooties. I am on aopen 390 od normal vrb off

-edit
I guess freesync on monitor, and gsync off nvcp is it? eyeballing ufo shows a lot less ghosting on the bottom light blue ufo. appears to eliminate visible trailing effect in game too, at least the crosshair is looking normal like when I was on OD normal.

[axaro1]

I don't get your post completely. So you are saying monitor freesync on nvcp off is better right?

It depends.

If you were using Freesync OFF and OD Extreme at 390hz then this tweak is good to reduce overshoot.
OD Normal performs slightly worse with Freesync so unless you want to use VRR keep Freesync OFF.
This trick also reduces 240hz overshoot (because OD Normal with Freesync ON scales with slightly slower response times in the entire refresh rate range)

at least the crosshair is looking normal like when I was on OD normal.

I don't know how you are managing to see motion artifacts with what I assume is a stationary crosshair.

[DPRTMELR]

I don't get your post completely. So you are saying monitor freesync on nvcp off is better right?

It depends.

If you were using Freesync OFF and OD Extreme at 390hz then this tweak is good to reduce overshoot.
OD Normal performs slightly worse with Freesync so unless you want to use VRR keep Freesync OFF.

cool got it. I will keep on it for a week or two and see if i can adjust.

This trick also reduces 240hz overshoot (because OD Normal with Freesync ON scales with slightly slower response times in the entire refresh rate range)

Maybe I am a savage but one of the game I play sometimes is hardlocked at 300fps and 390 normal looked "okay" lol.

at least the crosshair is looking normal like when I was on OD normal.

I don't know how you are managing to see motion artifacts with what I assume is a stationary crosshair.

I have no idea either when everybody else are just dandy with their od/vrb extreme combo like they are kings.
With freesync off vrb off od extreme, I could see the bottom and top crosshairs bleeding to their sides somehow when things are in motion. It's more pronouced on red thicker crosshair with outlines but you could see them on thins without outlines. I am on aopen model if it makes any difference.