Red,
the early boot menu of the CSPPC card can be seen through either 15Hz mode or 31Hz. One of your cards most likely has been preset to show it in 31Hz and possibly your C= monitor can't sync that high.
Here's what you do:
Power up your A4K with the CSPPC installed.
Hold the ESC key.
When you notice that the early boot menu finished loading and is acting weaird (high sync), simply hit space to switch to 15Hz mode. Go to the built-in prefs and set the 15Hz as default and SAVE.
