Question Only getting 120hz max on 144hz monitor

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effable

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Oct 10, 2017
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Hey guys, I have a Viewsonic XG402G
I am connecting to laptop with hdmi 1.4. I was told 144hz would work but can only set 120hz at max
It's a windows 10 gaming laptop and its running 1080 p.
ive tried a different cable but no luck.
pls help ty :)
 
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I think HDMI 1.4 should support 144Hz at 1080p. The XG2402's product page* lists the screen as having HDMI 1.4, as well as supporting up to a 144Hz vertical refresh over HDMI...
https://www.viewsonic.com/us/monitors/shop/xg2402.html#specs

And that refresh rate is shown as supported by HDMI 1.4 in this chart...
https://en.wikipedia.org/wiki/HDMI#...I#Refresh_frequency_limits_for_standard_video

Have you tried testing if 144Hz is available within a game, rather than just on the Windows desktop? I was just wondering if it might have anything to do with Windows switching to onboard graphics from a dedicated card (assuming it has one) to save power when not running games. This is just throwing ideas out there though, as I'm not particularly familiar with the details of running a 144Hz screen with a laptop.

In any case, I doubt the difference between 144Hz and 120Hz would be too noticeable.

*I'm assuming you're referring to the XG2402, since I don't think the XG402 is an actual screen.
 
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Check the settings in the monitor. Usually 144Hz must be enabled both in the monitor and in Windows. Also, make sure you're not using the ViewScale settings that rescale the image, as certain refresh rates are not available with that feature - try the "Full" or "1:1" settings.

As noted above, HDMI 1.4 should be able to handle 144Hz. Just make sure it's not HDR content. Use color depth of 8 bpc with RGB or Y′CBCR 4:4:4 color format. You can find these settings in the nVidia or AMD control panel.

What's the model of GPU in the laptop and the model of the laptop itself? Maybe the HDMI port on the laptop is 1.2
 
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Well, the integrated graphics may have a bandwidth limit. If you want to run at 144 Hz you'd probably need to switch to dedicated GPU at all times which would reduce battery life. This option would be in the BIOS somewhere (though not all laptops have such an option).
 
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Glenwing said:
Well, the integrated graphics may have a bandwidth limit. If you want to run at 144 Hz you'd probably need to switch to dedicated GPU at all times which would reduce battery life. This option would be in the BIOS somewhere (though not all laptops have such an option).
Click to expand...
If you have switchable graphics, the output still comes from the iGPU even if it is being rendered by the discrete graphics. That being said, HD 630 graphics should support HDMI 1.4 as well.
 
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TJ Hooker said:
If you have switchable graphics, the output still comes from the iGPU even if it is being rendered by the discrete graphics. That being said, HD 630 graphics should support HDMI 1.4 as well.
Click to expand...
Some laptops have the ability to switch off the iGPU entirely and have the ports be driven directly by the dedicated GPU. Depends on the specific laptop though.

HDMI versions unfortunately don't define a device's capabilities, you can have bandwidth limitations below the maximum allowed by a version. For example Intel HD 4000 graphics support HDMI 1.4 but are limited to 225 Mpx/s over HDMI (about 2/3 of the full 340 Mpx/s).
 
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