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I have tried man solutions: Install LG Driver, Upgrade Intel UHD 620 Driver, Enable HDMI Ultra Deep Color.
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Hello MTom0
Thank you for posting in the Intel Community.
Bear in mind that this behavior can be because of a limitation on the graphics bandwidth for the video port on the system.
What is the model of the Intel® processor?
What video output are you using to connect the external display?
Have you confirm with Lenovo if the 4K @60Hz resolution is supported for the external display?
Hope this helps.
Regards,
Leonardo C.
Intel Customer Support Technician
Under Contract to Intel Corporation
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Processor: Intel i7-8550U 1.8GHZ, HDMI Output,I have confirmed 60 hz is supported. Any suggestions?
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Hello MTom0
Thank you for the information.
The Intel® Core™ i7-8550U Processor (https://ark.intel.com/content/www/us/en/ark/products/122589/intel-core-i7-8550u-processor-8m-cache-up-to-4-00-ghz.html) supports the following resolution 4096x2304@24Hz on Max Resolution (HDMI 1.4), I recommend confining with Lenovo what is the laptop's port capabilities for resolution, bear in mind that the internal design of the motherboard might include video converters from HDMI® to DP.
In addition you can review/confirm that the video cable revision supports the video bandwidth for 4K @60Hz.
Lenovo support:
https://support.lenovo.com/us/en/
Hope this helps.
Regards,
Leonardo C.
Intel Customer Support Technician
Under Contract to Intel Corporation
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