NVIDIA PATCHER, resolution over 400 MHz pixel clock is not showin up for selection

Heya,

Any detailed resolution that I add via CRU which exceeds 399.999MHz pixel clock is not visible for selection anywhere so I cannot use/activate it. I use CRU normally otherwise without issues. I did the "full" nvidia patch under normal Windows mode and restarted several times. Running these in this order:

1. reset-all.exe

2. restart64.exe

3. adding one detailed resolution with more than 400MHz (for example 420)

4. restart64.exe

did not help either.

Any ideas please?

Thank you very much!

My setup:

Windows 8.1 x64, gtx960, nvidia 372.70, large Trinitron CRT monitor over regular D-SUB analog, cheetos