What you write is REALLY interesting to me due to the following reasons:
- I have never had an issue with a 1060 card (that is the only 10XX card I have used for mining until now).
- I have isolated and the error 4 with EWBF ZCash miner was resolved as soon as I disconnected the only 970 card that I have. So my logic was THE OPPOSITE: I should get rid of the 970 to get only 10XX cards.
- I have never been able to mine more than 7MH/s ETH with the 970… what miner and pool are you using? I love that the 970 gives me 300 Sol when overclocked (I am using a EVGA GTX 970 SSC ACX2 card).
- Where are you getting the 970 at $120??? I agree with you, at that price, a Rig should be done with just 970!
In case someone is still reading… I have been able to isolate the error 4 with EWBF ZCash miner in the 970 using a riser version 5. I just bought and I am waiting for the new ones version 7 to see if that is the problem. Also, my PSU (Power Supply Unit) is heating a lot… could it be that at a peak, the PSU simply runs out of power? So, I also bought a second PSU and I am going to daisychain them.
Finally, I bougth the new ASrock H110 btc Pro+ Motherboard… I just LOVED the idea that a company would realease a MB (Motherboard) designed for mining! In case someone has not seen it:
Will post in 10 days that I receive the new risers, PSU and MB, how all is working!