Here's stats after 12h of mining my S9. Hashrate far below 14TH. At 650MHz hashrate was below 12TH and definitely ailing last board. Best hashrate got at 606.25MHz, 12,5Th @ 1310W from wall.

what is the ambient temperature in the room? I suspect that getting 14.0 th will not happen unless room is 70 f or 21.c
and that board is not sick 61c and 93c are fine