First what is the Hz of your Monitor?
Second here is information concerning DVI Maximum Resolutions and Hz: https://www.bluecinetech.co.uk/dvi-maximum-resolution-and-refresh-rate/
DVI Maximum Resolution and Refresh Rate
DVI-D dual-link has a maximum resolution of 3840 x 2400 at a 30 Hz refresh rate.
At 2560 x 1600 resolution, DVI-D dual link can support 60 Hz. Lowering the resolution even further to 1920 x 1080, and DVI-D dual link can support a refresh rate of 144 Hz.
DVI-D single link has a maximum resolution of 2560 x 1600 at 30 Hz. To reach 60 Hz on a DVI-D single link, set the resolution to 1920 x 1080 or lower.
Bear in mind, the maximum output resolution will depend on the device creating the signal. Graphics cards can usually output a wide range of resolutions, with the older models being limited to 4K.
However, if the DVI port is connected directly to your motherboard, the resolution output may be much lower. The maximum output will also be affected by the quality and length of the DVI cable.
Later on in this post, I’ll walk through the maximum resolutions, refresh rates, and bandwidth limits of each type of DVI.
It is a good chance that it is your DVI connection that is limiting you to 60 hz.
