The cards have been reflashed many times for safety always with parameters

nvflash64 --protectoff
nvflash64 -6 MyRom.rom

plus a slow card is running with the stock bios (8g unlocked on the PCB)

The reflash was done directly on the rig and also on another PC.

So I assume the problem is not in the reflash.

But thanks anyway every attempt is appreciated 

I am now investigating the IRQ assignment 

Bio