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hi, I'm looking for a fast IPS monitor under 300$.

I was told that the Lenovo Legion R27qe provide low response times is better than any 240hz monitor in terms of having the least motion blur. Is that true??

what monitors do u recommend?

thx

plautus wrote: ↑

22 Jun 2025, 05:45

hi, I'm looking for a fast IPS monitor under 300$.

I was told that the Lenovo Legion R27qe provide low response times is better than any 240hz monitor in terms of having the least motion blur. Is that true??

what monitors do u recommend?

thx

No, that is not how it works at all.
If we're talking about total motion performance (encompassing both eye-tracked & fixed-gaze scenarios) and assuming that you can run +1000FPS, then a 180Hz IPS panel cannot be of the same performance as a 240hz LCD panel.
This is how they scale:



^ What this infographic above means, is that eye-tracked motion blur (e.g.: moving object, you track it with eyes) gets lower as you increase refresh rate. This of course implies you run FPS=Hz.

If you want the best possible eye-tracked motion clarity at below 1000Hz refresh rate (e.g.: you can only maintain 240fps in titles you play), I'd opt for good backlight strobing implementations (ULMB, PureXP, DyAc...) and run FPS=Hz or FPS>=Hz

I don't know your region of purchase nor your budget, but the upcoming AOC Q25G4SR is the best buy in this price category as of the time of writing.
For a bit more, the Alienware AW2524HF can also be had.
Buying a 24-27" 1440p <240Hz display or 24" 1080p <300Hz display as of June 2025 is a complete misbuy.

kyube wrote: ↑

22 Jun 2025, 10:37

No, that is not how it works at all.
If we're talking about total motion performance (encompassing both eye-tracked & fixed-gaze scenarios) and assuming that you can run +1000FPS, then a 180Hz IPS panel cannot be of the same performance as a 240hz LCD panel.
This is how they scale:

This is true and accurate assuming similar panel tech; there's a with a nuance: GtG

___


The GtG nuance:

Large GtG differences (like different panel tech, e.g. TN versus older IPS, or LCD vs OLED, or other stuff) can create a slight overlap effect.

To disambiguate this, add GtG to refreshttime. That's not a perfect metric as GtG is not a squarewave but odd curves that vary between temperatures and different color combos -- but can approximate the blur penalty of GtG.

But this can still sometimes happen to IPS if there's no overdrive (e.g. laptop IPS LCDs). Which means a 3ms GtG + 4ms refreshtime (slow overdriveless laptop 240Hz OLED) can still allow a 180Hz desktop IPS to outperform (1ms GtG + 5.5ms refreshtime), for the eye tracking and pursuit camera situations.

It will still outperform in stroboscopics (smaller stroboscopic step for stationary gaze) but, there would be more tracking-based motion blur on a 240Hz laptop IPS than a recent 165/180Hz desktop IPS panel because of this.

GtG is like a slow moving camera shutter before/after refreshtime. You don't want 1ms GtG before and after your 2ms refreshtime (480Hz screen). But excessive overdrive, of course, is another ball of wax. Howeverwell-tuned overdrive (no ghosting, no coronas) on some desktop panels will give it the advantage over laptop/mobile IPS that skips overdrive to save battery power.

Needless to say, that's why I'm a big fan of OLEDs for their better motion ergonomics in extremely highly efficient blur-per-Hz without strobing that cannot be matched by LCD, which is important if you eyes bothered by blur and needs our namesake (hint: B__r B_st_rs). Now that said, I know kyube is somewhat cool about OLEDs. So I nuance it as, assuming you don't have a vision sensitivity to OLED that you don't have with IPS. Conversely, some people get less eyestrain from non-PWM desktop OLED than IPS LCDs -- myself included. Skipping the rabbit hole here in my walls of text. </YMMV>

are there any 27 fast monitors u can recommend?

also the response times he was refering to were i was told these response times are important, they decide when a pixel changes its color

then what is response time for?

plautus wrote: ↑

23 Jun 2025, 13:15

then what is response time for?

Response time is how fast a pixel fades from one color to the next.

It can take 3ms for red to "fade" to green.

HIGH SPEED VIDEO OF LCD REFRESH CYCLES: www.blurbusters.com/scanoutt

Faster GtG = Faster pixel change.

(Has nothing to do with tapedelay latency: e.g. transmission over cable etc -- that's a different itinerary, a different latency stage)

plautus wrote: ↑

23 Jun 2025, 03:17

are there any 27 fast monitors u can recommend?
also the response times he was refering to were image
i was told these response times are important, they decide when a pixel changes its color
then what is response time for?

I think you've misinterpreted how G2G RT's work.
What those heatmaps represent are gray-to-gray response time transitions.
For example: RGB(255,255,255) - RGB(0,0,0) is 1 such transition (pure white to pure black)

The general goal of G2G RT's is to be below the refresh rate (might be easier to think of Hz as ms)
This means that, a theoritcal LCD whose G2G RT values are below the refresh rate should look almost identical to OLED (""GtG=0"") in terms of eye-tracked motion performance (e.g.: moving object, you track it with target)
This means: if you have a 240hz display, you want all possible combinations to be <4,17ms (1000 / 240 = 4,17ms)

Now, in practice, most desktop IPS LCD's perform almost identical (5-10% difference in heatmaps) in terms of G2G RT's.
This means, to get (eye-tracked & fixed-gaze) motion clarity benefits, you want the highest refresh rate possible within your budget and your choice of pixel density (resolution)
This also means that a desktop 180Hz LCD IPS panel cannot be sharper in eye-tracked motion (let alone fixed-gaze) clarity than a desktop 240Hz LCD IPS panel.

The 2 images in my previous post above show how motion clarity increases depending on refresh rate increases (the images above assume you do FPS>=Hz)

I believe Chief's post + mine are enough for you to form your purchasing decision

kyube wrote: ↑

22 Jun 2025, 10:37

plautus wrote: ↑

22 Jun 2025, 05:45

hi, I'm looking for a fast IPS monitor under 300$.

I was told that the Lenovo Legion R27qe provide low response times is better than any 240hz monitor in terms of having the least motion blur. Is that true??

what monitors do u recommend?

thx

I don't know your region of purchase nor your budget, but the upcoming AOC Q25G4SR is the best buy in this price category as of the time of writing.

What do you think about the models Q27G42ZE and Q27G4ZR? They are really new and can't find any reviews but they released alongside the AOC Q25G4SR.

i understand it, however as far as im aware it doesnt take into account that response times being longer than the refresh window creates worse motion handling in ghosting and smearing

Chief Blur Buster wrote: ↑

22 Jun 2025, 18:51

kyube wrote: ↑

22 Jun 2025, 10:37

No, that is not how it works at all.
If we're talking about total motion performance (encompassing both eye-tracked & fixed-gaze scenarios) and assuming that you can run +1000FPS, then a 180Hz IPS panel cannot be of the same performance as a 240hz LCD panel.
This is how they scale:

This is true and accurate assuming similar panel tech; there's a with a nuance: GtG

___


The GtG nuance:

Large GtG differences (like different panel tech, e.g. TN versus older IPS, or LCD vs OLED, or other stuff) can create a slight overlap effect.

To disambiguate this, add GtG to refreshttime. That's not a perfect metric as GtG is not a squarewave but odd curves that vary between temperatures and different color combos -- but can approximate the blur penalty of GtG.

But this can still sometimes happen to IPS if there's no overdrive (e.g. laptop IPS LCDs). Which means a 3ms GtG + 4ms refreshtime (slow overdriveless laptop 240Hz OLED) can still allow a 180Hz desktop IPS to outperform (1ms GtG + 5.5ms refreshtime), for the eye tracking and pursuit camera situations.

It will still outperform in stroboscopics (smaller stroboscopic step for stationary gaze) but, there would be more tracking-based motion blur on a 240Hz laptop IPS than a recent 165/180Hz desktop IPS panel because of this.

GtG is like a slow moving camera shutter before/after refreshtime. You don't want 1ms GtG before and after your 2ms refreshtime (480Hz screen). But excessive overdrive, of course, is another ball of wax. Howeverwell-tuned overdrive (no ghosting, no coronas) on some desktop panels will give it the advantage over laptop/mobile IPS that skips overdrive to save battery power.

Needless to say, that's why I'm a big fan of OLEDs for their better motion ergonomics in extremely highly efficient blur-per-Hz without strobing that cannot be matched by LCD, which is important if you eyes bothered by blur and needs our namesake (hint: B__r B_st_rs). Now that said, I know kyube is somewhat cool about OLEDs. So I nuance it as, assuming you don't have a vision sensitivity to OLED that you don't have with IPS. Conversely, some people get less eyestrain from non-PWM desktop OLED than IPS LCDs -- myself included. Skipping the rabbit hole here in my walls of text. </YMMV>

But also oled can make the stroboscopic effect much more visible because there is less gtg blur than regular lcd gtg.