I would like to confirm the support for 120Hz from the graphics controller and the external monitor. Please attach the graphics report generated within graphics control panel.
Also, make sure you are using straight video cables, no adapters to be able to reach 120Hz.
Thank you for your patience.
I have been trying to get this information as fast as I could.
Please see the following refresh rate configuration since the Intel® HD graphics 530 can output 4K@60hz on each display individually
Yes, at 60Hz 1080p 4096x2304@24Hz 4096x2304@60Hz 4096x2304@60Hz
Sorry for busting in this conversation.
According to the link you kindly provided, this monitor only appears to have a DVI input. Please keep in mind that the Intel(R) HD Graphics 530 max refresh rate for DSub/VGA/DVI connections is limited to “DVI single link” pixel rates, thus 1600x1200@60 would be the limit.
If your computer has a DisplayPort (DP) output, then the Intel(R) HD Graphics 530 can support up to 4K@60hz (and thus should handle 1680x1050@120hz). A potential workaround I can think of would be attaching an active DP to DVI dongle from your motherboard DP connector. I'll send you a PM with a little bit more information on this.
Or, as you mention, lowering the resolution could do the trick.