/cet
What are you seeing when you look at /run/shm/.stat.log?
https://bitcointalksearch.org/topic/m.3103697
And I did these steps to order and insert the cards with least amount of slow/bad chips at the start and the bad boards at the back.
https://bitcointalksearch.org/topic/m.3119313
From this:
1: 880 31.081 33.083 2171 101 0 0 16 0 0 (1.943/chip) 100%
2: 880 28.146 30.821 1966 35 0 0 16 0 0 (1.759/chip) 98%
3: 770 26.285 29.690 1836 193 1 0 14 2 0 (1.643/chip) 86%
4: 770 25.641 28.031 1791 145 1 0 14 2 0 (1.603/chip) 92%
5: 825 29.664 31.286 2072 85 1 0 15 0 1 (1.854/chip) 93%
6: 880 21.289 22.873 1487 94 1 0 16 0 0 (1.331/chip) 97%
7: 880 28.390 29.986 1983 107 1 0 16 0 0 (1.774/chip) 99%
I'll have to come back to this, meeting time