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I was testing a 1440p 360Hz OLED (AW2725DF) and decided to also test out the PG248QP 1080p 540Hz

Initially with ULMB 2 on vs off I couldn't tell a huge difference to my OLED (I assume its because OLED motion clarity is already top notch) but then even on the PG248QP itself, turning ULMB on vs off didn't affect too much motion clarity, but again, I was testing on Valorant, so it may not be the best test for this type of comparison.

The biggest difference was when I turned up the overdrive on the PG248QP from Normal (which has 1.7 ms first response time) all the way to Extreme (which has 1.1 ms first response time) and that is when I finally noticed a noticeable difference more so than ULMB 2

But even with OD on Extreme, the OLED, specficially the AW2725DF, is 0.2 MS according to RTINGS, and the TN on Extreme according to RTINGS is 1.1 ms?! So OLED = goat for comp games now?!

It already beats response times of LCDs, and its pretty close in motion clarity to ULMB, with added benefits of colors, contrast/HDR, VRR, etc...

This is nothing surprising, the slow pixel transitions of TN prevent a true 540 Hz experience, reason why it may look no better than 360 Hz OLED. The faster transitions allowed by increased overdrive, can improve the 540 Hz experience and make it better than 360 Hz OLED. In the PG27AQDP reviews released yesterday, one of them talked about how OLED gives an equivalent x1.5 increase in refresh rate with respect to LCD, meaning that 480 Hz OLED would be equivalent to 720 Hz LCD. Since 360 x1.5 = 540, it fits your experience of comparable motion clarity between your 2 monitors.

Inco^ wrote: ↑

05 Sep 2024, 01:42

In the PG27AQDP reviews released yesterday, one of them talked about how OLED gives an equivalent x1.5 increase in refresh rate with respect to LCD

There is truth in that, but from personal experience I would say 1.5 is way too optimistic, unless the panel comparing it to has really bad overdrive. Compared to the "4ms" IPS 165Hz I was using for years that has perfect overdrive (g-sync module,) that number is about x1.2. Comparing it to a "1ms" TN panel I also have, but which has terrible overdrive, it's more like x1.3.

Inco^ wrote: ↑

05 Sep 2024, 01:42

This is nothing surprising, the slow pixel transitions of TN prevent a true 540 Hz experience, reason why it may look no better than 360 Hz OLED. The faster transitions allowed by increased overdrive, can improve the 540 Hz experience and make it better than 360 Hz OLED. In the PG27AQDP reviews released yesterday, one of them talked about how OLED gives an equivalent x1.5 increase in refresh rate with respect to LCD, meaning that 480 Hz OLED would be equivalent to 720 Hz LCD. Since 360 x1.5 = 540, it fits your experience of comparable motion clarity between your 2 monitors.

So true, I was expecting to see a noticeable difference, less so in 540Hz LCD nonstrobed vs OLED 360Hz, but atleast with ULMB ON, yet even with ULMB, I couldn't notice huge difference

And honeslty even when I turned on OD to Extreme, the response time was 1.1 ms and an OLED like aw2725df is 0.2 ms so it still losses, i have no clue why go for LCD at this point, it losses in comp games and losses in graphics games and if you go for the high tier list LCD for comp games, they cost same as OLEDs

RealNC wrote: ↑

05 Sep 2024, 06:02

Inco^ wrote: ↑

05 Sep 2024, 01:42

In the PG27AQDP reviews released yesterday, one of them talked about how OLED gives an equivalent x1.5 increase in refresh rate with respect to LCD

There is truth in that, but from personal experience I would say 1.5 is way too optimistic, unless the panel comparing it to has really bad overdrive. Compared to the "4ms" IPS 165Hz I was using for years that has perfect overdrive (g-sync module,) that number is about x1.2. Comparing it to a "1ms" TN panel I also have, but which has terrible overdrive, it's more like x1.3.

I seen people say 360Hz OLED = 480Hz LCD, so by that logic a 480Hz OLED = 640Hz LCD?!

Anyway, this site does mention that 1.5x to 2x advantage over LCD when it comes to motion blur: https://www.theverge.com/24035804/360hz ... e-msi-asus

GFresha wrote: ↑

05 Sep 2024, 13:23

Anyway, this site does mention that 1.5x to 2x advantage over LCD when it comes to motion blur: https://www.theverge.com/24035804/360hz ... e-msi-asus

I don't think The Verge has ever said anything that's actually true or correct

RealNC wrote: ↑

05 Sep 2024, 14:24

I don't think The Verge has ever said anything that's actually true or correct

Whoops nvm then, but in general is it true 360Hz OLED is 480Hz LCD and 480Hz OLED is 640Hz LCD or we dont have a for sure conclusion on that part?

GFresha wrote: ↑

05 Sep 2024, 14:33

Whoops nvm then, but in general is it true 360Hz OLED is 480Hz LCD and 480Hz OLED is 640Hz LCD or we dont have a for sure conclusion on that part?

It is clearly better when it comes to motion blur, but I don't know of an objective way to put a number to it. Again, from my own experience by comparing OLED to three different LCDs, I would put it somewhere between 1.2x and 1.3x better, simply by comparing refresh rates. Against a good LCD for example, 60FPS/Hz on OLED looks like about 70FPS/Hz on the LCD. 100FPS/Hz on OLED looks about as clear as 120FPS/Hz on LCD. That's where my 1.2x number comes from. But the keyword here are "about." How would you even measure that in a way that puts an actually accurate and objective number to it?

(Btw, when I write "FPS/Hz" I just mean VRR is used, so FPS and Hz always match.)

But what I can tell you is that there's no way it's 1.5x better, let alone 2x (lol) better. If you look at 60FPS/Hz on OLED, you will still clearly know, without a shadow of a doubt, that it's somewhere in the ballpark of 60 to 70FPS. 120FPS/Hz on LCD is still pretty much as superior to 60Hz OLED as it is to 60Hz LCD.

The majority of the motion blur on LCD doesn't come from its slower pixel response time. It comes from the nature of sample-and-hold frame presentation. OLED gets rid of virtually all motion blur that LCD would have due to their higher pixel response times. But it still has the sample-and-hold blur, which you cannot get rid of since it's not the display that's blurry. That blur is created by our eyes/brains. Near zero pixel response time isn't gonna fix that.

Makes sense, thanks

I should receive the PG27AQDP in about 2 weeks (1440p 480Hz OLED), will let you know my feelings on how it compares to PG248QP (1080p 540Hz TN) for competitive FPS.