DVI-D cannot do 120Hz
Anyway, you must check your motherboard's manual or specifications about supported resolutions. For example here's one to know what to search for:
Integrated Graphics Processor-Intel® HD Graphics support:
1 x D-Sub port, supporting a maximum resolution of 1920x1200@60 Hz
1 x DVI-D port, supporting a maximum resolution of 1920x1200@60 Hz
* The DVI-D port does not support D-Sub connection by adapter.
1 x DisplayPort, supporting a maximum resolution of 4096x2304@60 Hz
* Support for DisplayPort 1.2 version.
1 x HDMI port, supporting a maximum resolution of 4096x2160@24 Hz
* Support for HDMI 1.4 version.
Support for up to 3 displays at the same time
Maximum shared memory of 1 GB
Thank you very much to Balazs1 for the information provided above.
I hope the information posted previously was helpful for you, additionally on the following link you will be able to confirm the max resolution supported depending on the video port that you are using, please check graphics specifications:
And here is the data sheet for that processor, where you can also verify the resolutions supported by it and confirm that for the DVI-D port the max resolution is 1920X1200 @60Hz, please check page 36:
Any further questions, please let me know.
DVI-D support 120Ghz. I have GeForce GTX750, they work fine 1920x1080 120Ghz.