Custom Resolution Utility (CRU)

[Globespy]

I have a 1080p HDTV with a native panel resolution of 120Hz.
My Nvidia control panel allows me to successfully create a new 120hz screen resolution. Some text is blurry on things like driver update Windows.
Will CRU utility do anything differently from creating the custom resolution in the Nvidia control panel?
I have tried to use it before and ended up with black screen, luckily i have a Windows 10 restore disk so was able to quickly restore a previous setup.
If CRU utility will provide a better outcome with better latency then I'll try it but would appreciate some clearer instructions as those in the OP didn't work for me. Thanks.