I think that two processor cores do not pull a large number of video cards. Today 6 cards 1060 3 GB were launched and two cards yield 11,000 sol, and four cards total 9700 sol. Loading of processor cores is 40%.
If you run three cards, then we have one -11,500 and two 10500 sol/s.
It is also clear that well-functioning cards have 75-80% of capacity, poorly operating only 65-70% of capacity.
Overclocking parameters are the same.
On a farm where there are four core processors there are no such problems. All the cards give 11400 sol/s. Loading of cores up to 20%