Acer 390Hz monitor - XV252QF

[BTRY B 529th FA BN]

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[CJRS]

I'm sure the Acer is better. Especially since it's both IPS. Also 24.5inch > 27inch for competitive fps. And the strobing could benefit u for spray control.

[Discorz]

Guys anyone knows how much better is this in comparison with the VG279QM? I could get the Asus for $330 or the Acer for $550. I play CSGO (400 fps) and 1.6 (capped at 100 fps). Heard the input lag on VG279QM is really bad with low framerates?

Only if you set it to fixed resolution like 1920x1080@60Hz. Otherwise vrr doesn't have such input lag issue.
I would assume VG is very close to XV. ms.potatoe even mentioned he feels like lag is better on VG, here.

[ms.potatoe]

VG279M is a great monitor, I like a bit more than his little brother. XV252 is slightly better. A personal choice to pay 200€ more. For me would be a whim and crazy having both xd.

VG input lag is excellent. With VRR ( RTINGS ), VG 1,8 ms, PG259QN 2,0 ms, X25 2,5 ms... and yeah I dont "feel " XV improve those 1,8 ms.

[Evis]

VG279M is a great monitor, I like a bit more than his little brother. XV252 is slightly better. A personal choice to pay 200€ more. For me would be a whim and crazy having both xd.

VG input lag is excellent. With VRR ( RTINGS ), VG 1,8 ms, PG259QN 2,0 ms, X25 2,5 ms... and yeah I dont "feel " XV improve those 1,8 ms.

So you would rather get the XV for FPS competitive games even if it feels "slower" or whatever?

[north-player]

I'm not super knowledgeable about input lag or testing it, but I stumbled upon a Twitter thread where the poster (@nycfurby, tweets from July 26th) claims to measure ~1.2 ms of display lag, which is dubiously fast.

Side note: has anyone seen a link to buy this monitor through a Canadian retailer? With the announcements 480 Hz and 360 Hz TN are more than a year away (and probably $800) I might just have to buy now.

[Chief Blur Buster]

I'm not super knowledgeable about input lag or testing it, but I stumbled upon a Twitter thread where the poster (@nycfurby, tweets from July 26th) claims to measure ~1.2 ms of display lag, which is dubiously fast.

Some testers stop the lag benchmark as soon as GtG reaches 2% of the GtG 0% -> 100% transition. I personally prefer stopping the lag stopwatch at either GtG 10% or GtG 50%.

Frameslices are latency gradients unto themselves; vertically increasing in lag from top to bottom edge (between the two tearlines), as a +[0...frametime] lag modifier to the lag test. Keep in mind that the top edge of a VSYNC OFF frameslice is theoretically 0ms, the average VSYNC OFF latency is often half a frametime (of the VSYNC OFF lag tester) plus the LCD GtG latency and DP/HDMI transceiver latency, since the rolling window processing is extremely tight latency (well under 1ms).

No two lag test methods are alike, they use different stopwatch-start and stopwatch-stop triggers. You can't compare different websites' lag tests, only compare them within the SAME website (or SAME person test).

Pushing lag testing methodology to extremes (VSYNC OFF test, stopwatch stop at GtG 1% of the 0%->100% GtG pixel transition, and using 10,000 frames per second), and ALSO raster-interrupt-style beamrace the tearline to just immediately above the photodiode, I've seen certain raw LCD specimens hit slightly under ~1ms input lag.

I prefer more honest methods of lag testing though, and disclosure of lag test methodology.

[lizardpeter]

It would be awesome if everyone could vote for this monitor to be reviewed by RTINGs. That way we can get more objective information on it and see how it compares to others in input lag, motion clarity, etc.

[ms.potatoe]

VG279M is a great monitor, I like a bit more than his little brother. XV252 is slightly better. A personal choice to pay 200€ more. For me would be a whim and crazy having both xd.

VG input lag is excellent. With VRR ( RTINGS ), VG 1,8 ms, PG259QN 2,0 ms, X25 2,5 ms... and yeah I dont "feel " XV improve those 1,8 ms.

So you would rather get the XV for FPS competitive games even if it feels "slower" or whatever?

Yes and it feels more responsive due 390Hz

[Nycfurby]

I'm not super knowledgeable about input lag or testing it, but I stumbled upon a Twitter thread where the poster (@nycfurby, tweets from July 26th) claims to measure ~1.2 ms of display lag, which is dubiously fast.

Side note: has anyone seen a link to buy this monitor through a Canadian retailer? With the announcements 480 Hz and 360 Hz TN are more than a year away (and probably $800) I might just have to buy now.

Hi, how did you find my twitter? I actually did not say which monitor it was but I guess that's easy to find considering 390hz.

Some context:
I do not know the methodology that the lag tester is actually using - the test methods are not public as it's a unreleased lag tester. (Trying to get a hold of the person that actually created the device. (It's on loaner from RetroRGB)

I want to do further tests on different refresh and different panels to see whats up though, Vsync was turned off for the test.
Is there anything you want me to test about this monitor in particular input lag wise? It does feel extremely good for input delay regardless...the monitor I was playing on before this was the Zizworks x28.

Twitter thread in question:

https://twitter.com/nycfurby/status/1419873058672742401