ROG Swift PG35VQ issues

wizardmanbear · August 24, 2019

so i watched this linus video on youtube the other day: https://www.youtube.com/watch?v=NgDykMvzoG8

and it's got me really concerned about the latest ROG Swift PG35VQ. For the price you're paying for the monitor it seems everything isn't perfect. Linus talks about local dimming issues creating a white halo around the mouse pointer and that this can be solved by just turning local dimming off. However he also talks about some smearing/motion blur issue that can't be fixed with settings on the monitor....can someone elaborate what he means by this? as Linus didn't go into much detail about this other smearing/motion blur issue. I always thought motion blur was something local to video game settings rather than the monitor itself...also this monitor is capable of hitting 200Hz refresh so why are we seeing ghosting??? .I was a bit confused when Linus said "there's a fair bit of ghosting on this despite of all the tech asus have packed into it" and that "he can't fix the smearing/ghosting by just changing settings on the monitor"

I was considering paying an arm and a leg for this asus monitor but given these issues I'm holding off buying it until i know more details about them.

SolarNova · August 24, 2019

9 hours ago, wizardmanbear said:

so i watched this linus video on youtube the other day: https://www.youtube.com/watch?v=NgDykMvzoG8

and it's got me really concerned about the latest ROG Swift PG35VQ. For the price you're paying for the monitor it seems everything isn't perfect. Linus talks about local dimming issues creating a white halo around the mouse pointer and that this can be solved by just turning local dimming off. However he also talks about some smearing/motion blur issue that can't be fixed with settings on the monitor....can someone elaborate what he means by this? as Linus didn't go into much detail about this other smearing/motion blur issue. I always thought motion blur was something local to video game settings rather than the monitor itself...also this monitor is capable of hitting 200Hz refresh so why are we seeing ghosting??? .I was a bit confused when Linus said "there's a fair bit of ghosting on this despite of all the tech asus have packed into it" and that "he can't fix the smearing/ghosting by just changing settings on the monitor"

I was considering paying an arm and a leg for this asus monitor but given these issues I'm holding off buying it until i know more details about them.

Theres alot of base information to learn for a full understanding of what i mean, perhaps some time learning about monitor technology and how it works, and what test are available and what there results mean would help, none the less here ur answers.

Local dimming (FALD) has a limited number of zones, they use LED backlights, generally speaking they are not as fast as pixels and so can lag behind fast moving objects on dark backgrounds leaving a trail of bloomed light. In addition the areas for each zone are significantly bigger than most small objects displayed, like a mouse curser, so you will get this bloom/halo affect around the object.

Blurring/smearing is caused by slow pixel transition speeds, known as 'response time' .. not to be confused with 'input lag/latency'.

Frequency (hz) of the monitor helps perceived motion but does not directly affect blurring. That is caused by the pixel transition speed, which can and usually does end up being to slow for high frequency monitors.

E.G a 240hz monitor technically needs a response time (real response time not what the manufacturers spec) of 4.16ms, however many will have maximum response times in certain transition far longer (slow) than that, resulting in bluring.

In many cases it can be better in regards of reducing blurring, to get a slower frequency monitor with a fast pixel transition speed, over a higher frequency monitor and a slower pixel transition speed. eg a 120hz monitor with a 'real' response time of under 8ms maximum, vs a 144hz monitor with a maximum pixel transition speed of 12ms.

Review sites like rtings and tftcentral, aswell as a few others have testing methods that include accurate measurements of all pixel transitions. While manufacturers specs may say 1ms, this is a very misleading bending of the truth as it is usually a measurement of 1 specific transition at maximum overdrive that does NOT include overshoot or the full transition time.

rtings tests in this regard are the most accurate s they measure 0-100%. Meaning they start the timer as soon as the pixel start to transition and dont stop it untill the pixel has reached and stabilized at the desired color. This includes the time it takes to remedy any overshoot.

if you dont understand eveyrthing i have said thats fine, please take a look at both rtings and tftcentrals websites as they explain each individual test and what each result means both factualy and in regards ot hwo it affects what you see on screen.

Finally, you should know this. There is no perfect LCD monitor. They ALL have issues, for example no LCD monitor currently has a good black level uniformity ..none, not even $5 ones.