PG32UCDM Doesn't Cut the Mustard.

[dabooga]

Hello Blur Busters!

Long time lurker here . What finally made me break my silence is a disappointing recent experience with the PG32UCDM.

I've been with my PG279Q QHD IPS since 2019, and its implementation of ULMB has always impressed me, particularly at refresh rates of 85Hz and 100Hz. When playing demanding modern games I use the 'triple lock' of framerate = refreshrate = stroberate, and the results are CRT-like.

But in recent months I've been lured by the native 4K, HDR, black levels and alleged 'speed' of modern OLEDs. So I took the plunge and went with the PG32UCDM, thinking that even without ELMB the responsiveness and clarity would out-perform my IPS.

I was wrong. At 240Hz the PG32UCDM is extremely responsive and smooth, but the motion clarity is nowhere near what the PG279Q can achieve. Using the 120Hz-locked ELMB was an improvement, but motion blur (persistence blur?) and was considerably worse than the PG279Q.

So I have a two-part question. Firstly, why is this so? On paper, it is hard to conclude how panel type makes this particular IPS 'faster' than than this particular OLED. All 'objective' metrics indicate that OLEDs are superior to IPS in these regards, and most commenters across the interwebs seem to agree.

Secondly - and for this question I am eager to hear those who have used both panel types - what OLED monitor would perform as well as, or superior to, my PG279Q in terms of motion clarity? I am looking at trying an OLED with the highest ClearMR rating (21000), though my current understanding is that this rating is derived from a monitor's high refresh rate, not its blur-reduction modes.

Any insight would be much appreciated!

[RealNC]

So I have a two-part question. Firstly, why is this so? On paper, it is hard to conclude how panel type makes this particular IPS 'faster' than than this particular OLED. All 'objective' metrics indicate that OLEDs are superior to IPS in these regards, and most commenters across the interwebs seem to agree.

Backlight strobing ("ELMB" is the vendor-specific marketing term for it in your display) on an LCD that uses a backlight can provide much lower motion blur than OLED. If ELMB's pulse width is, say, 2ms, then on an OLED without BFI you'd need 500FPS@500Hz to match it.

With OLED BFI, you'd need 250Hz BFI (meaning internally it's 500Hz but every other frame is black, thus it's 250Hz effective.) OLED monitors don't have a backlight and thus you can't change the pulse width. At 500Hz, pulse width is 2ms because that's the frame time of 500Hz. It's not impossible to have OLED BFI use different pulse width, and there have been some TVs in the past that did this, but apparently it never took off for some reason.

Secondly - and for this question I am eager to hear those who have used both panel types - what OLED monitor would perform as well as, or superior to, my PG279Q in terms of motion clarity?

I don't think there is one. Maybe there's still some OLED TVs available that can do short pulse width BFI, but I never looked into it.

[kyube]

As RealNC has mentioned, on OLED you are limited by the native refresh rate for the total clarity (which is very far away from good LCD backlight strobing when it comes to clarity)
The only exception was the LG C1 TV, which at 120hz was able to strobe at 2.7ms MPRT (~360Hz of eye-tracked visual clarity in motion)
These articles may help you understand the issue better:
viewtopic.php?f=4&t=13792
https://blurbusters.com/blur-busters-la ... -and-hold/
https://blurbusters.com/the-stroboscopi ... -displays/




There's no OLED which can do <1ms MPRT "strobing" (called BFI in OLEDs)
You are stuck with displays such as the XG2431, XL2566K or MAG274QRF-QD (which can supposedly do ~1ms MPRT at 120hz refresh rate)

[dabooga]

With OLED BFI, you'd need 250Hz BFI (meaning internally it's 500Hz but every other frame is black, thus it's 250Hz effective.) OLED monitors don't have a backlight and thus you can't change the pulse width. At 500Hz, pulse width is 2ms because that's the frame time of 500Hz. It's not impossible to have OLED BFI use different pulse width, and there have been some TVs in the past that did this, but apparently it never took off for some reason.

These articles may help you understand the issue better:

Hi both - this has been quite eye opening. I hadn't realised how out of the loop I have been with this stuff! The push-back I'd gotten from OLED people had me under the spell I guess.

TFT Central recently reported that two of the forthcoming MSI OLEDs (272QP X50 & MPG 271QR X50) have a 'new' BFI function available at as low as 120Hz. But I now think that actually means 240Hz internally, so I think something has been miscommunicated there.

For my upgrade, I've decided to stick with IPS but move to a Mini-LED panel with a good implementation of strobing. Any thoughts on the forthcoming MSI 274URDFW E16M?

[RealNC]

For my upgrade, I've decided to stick with IPS but move to a Mini-LED panel with a good implementation of strobing.

It's always a trade-off. OLED has superior HDR, contrast, pixel response, and has zero backlight bleed, but LCD has much better blur reduction through strobing and superior VRR (for when you prefer that over strobing.) Pick your poison

[kyube]

For my upgrade, I've decided to stick with IPS but move to a Mini-LED panel with a good implementation of strobing. Any thoughts on the forthcoming MSI 274URDFW E16M?

You're not gonna find a Mini-LED display with a backlight strobing implementation as good as the XG2431 & XL2566K
The appeal of those 2 is that they have great adjustability (with the blurbusters utility) + decent G2G times to "hide" major crosstalk.
Alternatives, with low MPRT out of the box, include the MAG 274QRF-QD, S2417DG (long discontinued), EX3210U, Q24G2A (only at 165hz, its ~1,6ms MPRT judged solely by eye so it's not accurate)

Mini-LEDs are still LCDs, so the general rule of KSF/PFS LED backlight affecting overall visual performance in motion applies.
https://blurbusters.com/beautiful-red-p ... ion-badly/
Your only option would be to find a Mini-LED with a QD backlight or a classic YAG phosphor backlight ("WLED", with only a blue peak in the SPD)
I haven't found such a panel, but your search might be more fruitful.

Mini-LEDs also usually come with PWM flicker, which negatively impact visual performance in motion in both strobed & non-strobed scenario
viewtopic.php?t=6519

It's sadly a very lackluster market when it comes to ≥1440p backlight strobing...

[dabooga]

You're not gonna find a Mini-LED display with a backlight strobing implementation as good as the XG2431 & XL2566K

Totally. I've lowered my standards, having resigned myself to the fact that no near-future IPS will provide that level of motion clarity.

My hopes are with the forthcoming MSI 274URDFW E16M which ticks all of the boxes for me. Grok claims the monitor is a "LG.Display 4K Fast QD IPS panel" and "non-KSF/PFS, Mini-LED, high refresh rate, Adaptive-Sync, variable overdrive, and 0.3ms MPRT with Motion Clear BFI".

Too good to be true?

[RealNC]

Totally. I've lowered my standards

In that case you might as well try an OLED that offers 120Hz BFI (so 240Hz internal.) Just be careful to pick one that doesn't have a huge input lag increase in BFI mode. Unfortunately, the majority of them do that. Rtings reviews test for that, so always look there to see the BFI latency numbers.

[kyube]

My hopes are with the forthcoming MSI 274URDFW E16M which ticks all of the boxes for me. Grok claims the monitor is a "LG.Display 4K Fast QD IPS panel" and "non-KSF/PFS, Mini-LED, high refresh rate, Adaptive-Sync, variable overdrive, and 0.3ms MPRT with Motion Clear BFI".

I would stick to your PG279Q until some reviews of this display come out.
MSI likes to make decent ootb strobing implementations, we'll see how they'll do this one.

[kyube]

You're not gonna find a Mini-LED display with a backlight strobing implementation as good as the XG2431 & XL2566K

EDIT FROM THE FUTURE (February 2026): the market is still mediocre...
(I disregard any models with PWM-based light flicker dimming method)
I'd say that the former is much inferior compared to the latter (DyAc+ is great for chasing <1ms pulse on time)
I went through +40 Mini-LED displays in search to find a QD WLED backlight with good backlight strobing.
I've only found 10 which satisfy your criteria — ~1ms pulse on time backlight strobing, QD backlight, Mini-LED
Here they are:

1.) KTC M27P6
Best implementation by far, especially for the 27" 4K segment.
https://www.youtube.com/watch?v=JranOxeRXHc [MUB review]
https://www.youtube.com/watch?v=DpIOWQYhw7w [TFTcentral review; 0,75ms MPRT at 120, 144 & 160Hz; fixed MPRT target & variable duty cycle]
https://chimolog.co/ktc-m27p6/ → 12% duty cycle confirmation

2.) MSI 274URDFW-E16M
https://www.rtings.com/monitor/reviews/ ... urdfw-e16m
https://youtu.be/t-1g5J1KnRI?si=B4Nx6B-PzZfNGzkm&t=1263 (tftcentral)
https://www.youtube.com/watch?v=B6SNR_FP-to (dtech review)
https://www.youtube.com/watch?v=Jh2QY8IN3eU (dtech MPRT 320 VS 160HZ)

3.) MSI 274QPF X30MV
https://www.youtube.com/watch?v=LijzzvJ5Jf0 → DTECH
https://www.youtube.com/watch?v=KUttX9WMAiw → TFTCENTRAL
https://www.youtube.com/watch?v=46ttcUCwDO0 → DEVAISI NICE UFO @ 6:13
https://chimolog.co/msi-x30mv/ → 21% duty cycle confirmation

4.) AOC U27G4XM
https://www.youtube.com/watch?v=T4UJ-nT8L3I [MUB review]

5.) ASUS PG32UQXR
(noted to have ELMB as per TFTcentral) & the manual
Seems to just be a on/off toggle, with no ability to adjust pulse width.

6.) Cooler Master Tempest GP27Q
(QHD 165hz IPS, 576 zones)
Nice OD tuning @ 165hz, BL strobing is in 120-165Hz range
Comes with a external PSU
I wasn't able to find whether the internals have metal shielding inside.
MonitorsUnboxed
TFTcentral
TPU

7.) Titan Army P326MV MAX
https://jisakuhibi.jp/titan-army-p326mv-max

8.) Titan Army P275MV Max
https://chimolog.co/titan-army-p275mv-max/ (mention of 23% duty cycle @ 320Hz)
https://jisakuhibi.jp/titan-army-p275mv-max

9.) KTC M27P20 Pro
(4k 160hz IPS, 576 zones)
Comes with a external PSU
Strobing is shown by techless
SDR is flicker-free, HDR seems to be @~5khz pwm(+pam?)
It completely lacks internal shielding, as shown by snowman
techless
snowman
tftcentral
idk rando
osd showcase

10.) KTC M27T6
https://www.bilibili.com/video/BV12QoeYsE9K/
https://www.bilibili.com/video/BV1nHZbYeEV5/


Nothing else fits your criteria as of the time of writing.
(sadly, Acer's Mini-LEDs don't have a VRB implementation...)
A few interesting, unreleased Mini-LEDs which are on the horizon:
Nvidia is coming out with a Pulsar-capable MiniLED panel later-on (likely end of 2026 or some time in 2027), as per:

Hopefully, they'll allow adjusable pulse width in it's ULMB2 mode this time around!

1.) MSI 272QPX
(27" QHD 500Hz IPS)
I don't think this will come out anytime soon...
https://www.displayspecifications.com/en/model/05c93797

Here's also a comparison between OLED & Mini-LED by techless:

phpBB [video]