New Monoprice 32" Monitor - Fails 144Hz, but Works 143 Hz

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vince
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New Monoprice 32" Monitor - Fails 144Hz, but Works 143 Hz

Post by vince » 23 Jan 2019, 23:25

Full name of the Monitor:
Monoprice 32" QHD 1440p 144Hz VA Frameless Aluminum Desktop Monitor with Height Adjustable Stand

Monitor can be found here:
https://www.monoprice.com/product?p_id=33822

So I'm having the oddest issue I've encountered so far:
The monitor supports 144Hz at 2560x1440.
The monitor reports 144Hz at 2560x1440.
Testing the monitor on the UFO test, etc, reports ~144Hz.

However, when viewing it, the refresh rate is drastically lower, closer to 75Hz.
It is noticeable when recording the screen on an iPhone 7+ in Slo-Mo mode.

Anyone have this monitor and could speak to a solution?

Someone linked me to this post: https://slickdeals.net/forums/showpost. ... stcount=26
which discusses the fact that the Nvidia cards may have some sort of issue with frame repeats, but I doubt this would come into effect on the desktop - the monitor appears to be displaying the same refresh rate constantly.

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Re: New Monoprice 32" Monitor - Cannot run at 144Hz?

Post by Chief Blur Buster » 24 Jan 2019, 01:34

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Re: New Monoprice 32" Monitor - Cannot run at 144Hz?

Post by vince » 26 Jan 2019, 05:48

Chief Blur Buster wrote:Can you please test:
http://www.testufo.com/refreshrate
143.997Hz at 144Hz
142.997Hz at 143Hz
Chief Blur Buster wrote:And post a picture of
http://www.testufo.com/frameskipping
Sorry I tried to resize these but the img tag doesn't seem to let me!

144Hz Fullscreen Image
144Hz Image
143Hz Fullscreen Image
143Hz Image

phatty
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Re: New Monoprice 32" Monitor - Cannot run at 144Hz?

Post by phatty » 26 Jan 2019, 14:34

ouch
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RealNC
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Re: New Monoprice 32" Monitor - Cannot run at 144Hz?

Post by RealNC » 26 Jan 2019, 17:30

It's clearly frame skipping. It looks like it's only doing 60Hz effective scanout when in 144Hz mode.

143Hz seems fine.
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New Monoprice 32" Monitor - Fails 144Hz, but Works 143 Hz

Post by Chief Blur Buster » 26 Jan 2019, 22:30

Wow.

144Hz frameskips and 143Hz is perfect?

Try a different formula in Custom Resolution. It might cause 144Hz to work.

Image

Failing that, try going to Manual and varying the Vertical Total a bit, until it works.

This is the technique that fixed frameskipping on some other 240Hz monitors.
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Re: New Monoprice 32" Monitor - Fails 144Hz, but Works 143 H

Post by vince » 27 Jan 2019, 13:42

Chief Blur Buster wrote:Wow.

144Hz frameskips and 143Hz is perfect?
Oddest problem I've ever encountered..

Chief Blur Buster wrote:Try a different formula in Custom Resolution. It might cause 144Hz to work.
None of the formulas worked.
Chief Blur Buster wrote:Failing that, try going to Manual and varying the Vertical Total a bit, until it works.

This is the technique that fixed frameskipping on some other 240Hz monitors.
Good call, reducing Vertical Total Pixels from 1481 to 1460 makes it work. Any higher and it starts frameskipping again.


Thanks for your help with this, Mark! Deeply appreciate it.

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Re: New Monoprice 32" Monitor - Fails 144Hz, but Works 143 H

Post by Chief Blur Buster » 27 Jan 2019, 22:38

I guess we need to report this to Monoprice.
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