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July 6th, 2025 19:45
XPS 9575, S2725QC, USB-C maximum 120Hz screen refresh rate only at a resolution of 2560x1440
Why is the 120 Hz refresh rate only available at 2560x1440 resolution? While when I set it to 3840x2160, it only goes up to 60 Hz? Should I switch the external monitor from the integrated graphics card to my discrete one? However, I can't find an option to switch from the integrated graphics to the discrete graphics on my laptop when connecting an external monitor.
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vital32
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July 6th, 2025 20:03
maybe this is because my port DisplayPort 1.2 and monitor 1.4 version?
ejn63
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July 6th, 2025 20:45
Yes, it is - displayport 1.2 is 4K 60 Hz max.
This system does not have a true discrete GPU - it's software controlled, so the Intel GPU processes all video on its way to all the display outputs, internal and external.
vital32
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July 7th, 2025 01:00
thank you.... very much