How can I enable 120 Hz output on HD 620?

[HAmbl]

I am using an i5-7200U Surface Laptop, which drives a 1920×1080 monitor, set at 120 Hz. The HD 620 is only managing to output 60 Hz (up to 70 when using EDID overrides). This is a significant downgrade from the 120 Hz that was being output by the HD 4400 present in my much older Surface Pro 2, using the same cable and monitor. Is there a driver patch coming to Kaby Lake mobile graphics, or is there another workaround possible?

[Alberto_R_Intel]

HAmbl, Thank you for posting in the Intel® Communities Support.

In order for us to provide the most accurate assistance, we just wanted to confirm a few details about your system, please provide the graphics report:

https://www.intel.com/content/www/us/en/support/articles/000005848/graphics-drivers.html

Also, please provide the SSU report:

https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility

To attach the report, once you choose "reply" select the "clip" icon on the lower left corner.

Just to let you know, in the following link you will be able to confirm which is the max resolution supported by the Intel® Core™ i5-7200U processor depending on the video port being used, for HDMI 1.4 will be 4096x2304@24Hz:

https://ark.intel.com/content/www/us/en/ark/products/95443/intel-core-i5-7200u-processor-3m-cache-up-to-3-10-ghz.html

Regards,

Alberto R.

Intel Customer Support Technician   

Under Contract to Intel Corporation

[Alberto_R_Intel]

HAmbl, I just wanted to check if you saw the information posted previously and if you need further assistance on this matter?

Regards,

Alberto R.

Intel Customer Support Technician   

Under Contract to Intel Corporation

[Alberto_R_Intel]

HAmbl, Since I have not heard back from you, we are closing the case, but if you have any additional questions, just reply back or post a new question.

Regards,

Alberto R.

Intel Customer Support Technician   

Under Contract to Intel Corporation