05/22/2020 UPDATE. The IPS 240hz monitor tier list.(I've measured/tried the all) and my honest explanation why.

[axaro1]

I only have a setting in the OSD called ELMB-Sync, no ELMB by itself. Same with Freesync disabled, so is the setting ELMB-Sync but Freesync off, or is there a separate setting for ELMB?

Enable ELMB-Sync but disable Adaptive-Sync(DP)

Steps to reproduce the issue in Frog Pursuit:
- Set refresh rate to 280hz in the monitor's OSD + in Windows
- Enable Adaptive sync and enable ELMB-Sync
- Set the fps to 240 in Frog Pursuit, if you see the refresh rate changing in the monitor's OSD it's working correctly, if this is the case either stay at 240fps in Frog Pursuit or change it to 280fps
- Look at the "traffic light" in on top of the frogs, you will notice image doubling
- Now disabled Adaptive-Sync(DP), it will force standard ELMB
- Image doubling disappear, motion clarity is noticeably improved

[RLCSContender*]

Because i get conflicting information about the Asus VG259Qm and the VG279QM, i'm launching a full investigation on this matter.

The information that i'm frequently getting is that @240hz, the VG259qm's OD 80 has too much inverse ghosting as opposed to VG279qm where it doesnt' have inverse ghosting. From my recollection, the VG279qm had slight inverse ghosting at around 2-3% and a 3.8 g2g average which is VERY good

so i took it upon myself and i will review the Asus VG259Qm, the 25" version. maybe the overdrive tuning is different in this model, who knows. But there have been members here who claim that 80 OD is unplayable at 240hz because of inverse ghosting so that really piqued my interest.

unfortunately, you guys have to wait until june 8 since that's when my vg259qm will arrive. Obviously, this wont' be a full review where i measure the colors, ergonomics, picture quality, etc. It's strictly peak performance and checking to see if there really is bad inverse ghosting @240hz on OD 80.

btw, if i like the results, i intend to keep the monitor, a dual monitor setup with the msi mag251rx would be awesome. I miss gaming on 280 FPS on rocket league. I seriously doubt it's better than the MSI MAG251RX but then again, ppl also claimed that the 25" version has better colors, contrast ratios, and color uniformity.

6/8/2020 the 25" version of the asus vg259qm will be reviewed and results will be posted.

I really really assumed the 25" and the 27" version were the same exact MONITOR just different monitor sizes, but based off what i've seen; it seems like these two monitors are using a totally different panel. Yes, they are both using the fast IPS AHVA AU Optronics panels but the 25" sometimes use the sister AHVA AU optronics panel where the contrast ratios, response times, color uniformity, and Overdrive tuning is different.

the naming of these monitors really threw me off. HAd they named the 25" 280hz monitor differently, it would've been easier to not assume that they were both the same exact panel but with different display sizes. The aw2720hf and the aw2521hf are two totally different panels with different overdrive tunings, contrast ratios, and response times.

[fowteen]

Looking forward to this! Sorry haven't read all of your posts but do you only measure response times or input lag too?

[iopq]

So what I use now for competitive gaming is 280hz refresh rate + ELMB (with VRR disabled), at 280hz I don't really notice tearing even in the 220-280fps range.
The strobe duration last 1ms compared to ELMB-Sync's 2ms, which is surprisingly long enough to remove crosstalk and idk if it's placebo but I feel like processing lag is reduced compared to ELMB-Sync (there's no need to sync strobe with framerate).

This is a message to VG279QM/VG259QM owners who are currently using ELMB-Sync at either 240 or 280hz: Disable Adaptive Sync and try to ELMB with no Freesync/Gsync.

So I just bought it, I'm wondering what the best settings are. So far I can either cap the game to 250 FPS (capping above doesn't actually cap anything, it goes 300+) or use VSYNC to get 280 FPS. Which one should be better? It's an RTS game, so pure speed is not necessary, but I did get a 280Hz monitor, lol

[RLCSContender*]

Looking forward to this! Sorry haven't read all of your posts but do you only measure response times or input lag too?

both. Input lag, i extrapolate the data with my custom built usb hardware(also attached inside is a photodiode that measures light changes) which then is connected to an oscilloscope and HDD/PC. Yes, you HAVE to build your own becuase you cannot find hardware like a photosensor that connects DIRECTLY to an oscilloscope, u have to use the smaller parts like a photo diode/oscilloscope clamp or hardware that measures latency HAS to be connected directly to an HDD/PC, so u have to solder some wires together and get a platform(a cheap small tiny box).

The biggest pain in the butt was the 60hz input lag tests since i don't have a leo bodnar tool and i hafe to add 17ms since you need 17ms at 60hz refresh. The hardest pixel response time to measure was those alienware. Other than that, it's up to YOU to actually put trust on my tests. If you are skeptical, then IGNORE the actual data, but focus on the extremes. More often than not, the top 3 fastest ips monitors are FASTER than the bottom 3 ips monitors for example. The ones in the middle however can be tricky to convince ppl.

then again, i'm not doing this for a financial incentive. Nor am i paid reviewer, nor am i an affiliate of a company that i review from. I'm just doing this as a project(i find it more like a hobby than anything). I have nothing to gain, i just genuinely enjoy learning about computers. it's not about the outcome, but the PROCESS and i thoroughly enjoyed it particularly these quarantines which helps kill time. After the VG259qm, it will be the alienware aw2521H (360hz IPS monitor), then i'm done.

[iopq]

You should do these as a YouTube review, even a few thousand views per video can get you some extra cash for your effort without compromising any integrity of the review

[bleach]

The information that i'm frequently getting is that @240hz, the VG259qm's OD 80 has too much inverse ghosting as opposed to VG279QM

but then again, ppl also claimed that the 25" version has better colors, contrast ratios, and color uniformity.

My VG259M had visibly better colour compared to my VG279QM. Funny, I thought racing mode on the VG279QM looked a lot more gray, but didn’t bother mentioning it.

[axaro1]

So I just bought it, I'm wondering what the best settings are. So far I can either cap the game to 250 FPS (capping above doesn't actually cap anything, it goes 300+) or use VSYNC to get 280 FPS. Which one should be better? It's an RTS game, so pure speed is not necessary, but I did get a 280Hz monitor, lol

If I was you I'd set the refresh rate to 280 and enable freesync/gsync, you don't want tearing when you play an RTS game.

[RLCSContender*]

Did my extensive research and i can 90% confirm that the VG259qm is a totally different AUO fast IPS panel compared to the VG279qm. And that all of the evidence is pointing in the direction that it's using the sister AHVA AOU fast IPS panel, the one the alienware aw2521hf and MSI MAG51rx, and predator xb253q g uses.

almost every person here who talked about the vg259qm contradicts my recollection when i owned the vg279qm.

the monitors didn't come out at the same time. It did however come out in a very similar date in march with the Alienware aw2521hf

Basically, all of the reviews that you guys have read about the vg279qm shouldn't be USED to compare it to the vg259qm because i'm fairly certain Asus is using the sister AHVA AOU panel(which in my opinion is the superior version).

1. the horrendous 60hz input lag shouldn't be applied
2. the grainy look with yellow color uniformity(especially on white backgrounds) shouldn'tbe applied
3. Any response time tests you've seen from the reviewers shouldn't be used since the 27" version vs the 25" version are using different AOU panels, the same way the alienware aw2720hf and alienware aw2521hf are using two different panels

the reason why i assuemd they were the same panel was because they named them the same way(except different numbers) and I just assumed it was just a 25" version of the VG279qm.

[RLCSContender*]

also what refresh rate do you guys play at on the 25" asus?

i always played at 280hz, i don't see the reason to use the monitor at 240hz but that's just my opinion.