I think 3060s are the most problematic series in this generation I think  

If your cards are not LHR, there 3 things to look:

1 - Drivers
2 - PCI-e 8x
3 - Monitor plug

1 - As Williamm07 said, try driver 470.05

2 - Try to connect one card directly to motherboard, some people related 3060s didn't work well with less than PCI-e 8x speed

3 - Try to connect cards in a monitor, or a dummy plug, maybe the card needs to be connected to achieve maximum hashrate

These 2 videos are  good to start:
https://www.youtube.com/watch?v=yE2Kmb3ZHEQ

https://www.youtube.com/watch?v=uDiEOscA2vw