To your experience, are these type of crashes HW, SW or it could be anything?
The only reason i had so far for a full freeze was if i OC the first card a little bit to much. Try to lower the OC settings for your GPU0 a little bit.
The problem is that it's happening even when I am not overclocking the rig, i.e.:
POWERLIMIT_WATTS=100
__CORE_OVERCLOCK=0
MEMORY_OVERCLOCK=0
The rig has 12 GTX 1060 6Gb (from different manufacturers)
Do you have Maxximus007_AUTO_TEMPERATURE_CONTROL="YES"? If no maybe your card is getting to hot.
Do you have damNmad_ALGO_SPECIFIC_OC="NO"? If it is YES your core overclock setting not applied.
You can try to change the first card. Just exchange the riser from your primary pcie slot with another one.