Question Can't run 4k 60hz - new screen relatively modern laptops

Aug 3, 2021
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Hi guys!

I have this monitor:
https://www.benq.com/en-me/monitor/gaming/el2870u/specifications.html

And this laptop:

And also this laptop:
https://www.safepcdirect.co.uk/refubished-asus-ux330u-i7-7500u-8gb-ram-512gb-ssd-13-windows-10-a.html

Both laptops can reach 4k resolution. However, when I try to change the refresh rate in windows 10 it gives me only up to 30hz.
If I use 1440p I can choose 60hz. The difference in lag is very noticable.

I have an HDMI cable that says 'High Speed HDMI'.

I don't plan any gaming I just want desktop and youtube 4k. Is there any workaround so I can experience 4k more smoothly? Or am I bound to use 1440p until I get my next PC?

Thanks!
 

Zerk2012

Titan
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The older one also support only display port https://www.intel.com/content/www/us/en/products/sku/85212/intel-core-i55200u-processor-3m-cache-up-to-2-70-ghz/specifications.html?wapkw=i5-5200u

But the laptop itself doesn't have a display port and it has only USB 3.0.. I can't find a display port to USB 3.0 adapter.
Is this a dead end?
It depends on the HDMI version of the LT. I can't find what version it is so depending on the version it can be limited to 30FPS @4K a display port adapter will not change the output limit. EDIT you can't use a adapter on a HDMI 1.4 port and expect it to magickly change it over to DP 1.2

The processor has HDMI 1.4 ability and is good for 30FPS @ 4K it does support DP 1.2 that would give you 60FPS @ 4K but no output for it so your out of luck.
 
Last edited:
Aug 3, 2021
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It depends on the HDMI version of the LT. I can't find what version it is so depending on the version it can be limited to 30FPS @4K a display port adapter will not change the output limit. EDIT you can't use a adapter on a HDMI 1.4 port and expect it to magickly change it over to DP 1.2

The processor has HDMI 1.4 ability and is good for 30FPS @ 4K it does support DP 1.2 that would give you 60FPS @ 4K but no output for it so your out of luck.
I meant a DP to USB 3.0 adapter but I can see they are all 30hz.

Check out super resolution in monitor osd, apparently it upscales lower resolutions well but there may be some input lag. See what you think running this option at 1080p.
I think i'll go with 1440p, it works decent enough.

Thanks guys
 
...
Both laptops can reach 4k resolution. However, when I try to change the refresh rate in windows 10 it gives me only up to 30hz.

I have an HDMI cable that says 'High Speed HDMI'.

Thanks!

High Speed HDMI Cable
The High Speed HDMI Cable is designed and tested to handle video resolutions of 1080p and beyond, including advanced display technologies such as 4K@30Hz, 3D, and Deep Color. If you are using any of these technologies, or if you are connecting your 1080p HD display to a 1080p HD content source, such as a Blu-ray Disc player, this is the recommended cable.
https://www.hdmi.org/resource/cables

if you want 4K at 60Hz then you need cable labeled as premium high speed (usualy with ethernet) rated at 18GBs
 

chaoyang

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Oct 24, 2019
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Your laptop is only advertised to run on 4K with the laptop screen that comes with it, trying to connect it to a monitor with bigger resolution will put a lot of pressure on your hardware.
 

boju

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https://www.hdmi.org/resource/cables

if you want 4K at 60Hz then you need cable labeled as premium high speed (usualy with ethernet) rated at 18GBs
Won't make a bit of difference when port is the limiting factor.

Your laptop is only advertised to run on 4K with the laptop screen that comes with it, trying to connect it to a monitor with bigger resolution will put a lot of pressure on your hardware.
4k doing general stuff at desktop, not playing games, as intended by the OP is hardly taxing.
 

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