I have 13 total. Although they run in my chilly basement, they are not all situated equally with regard to direct airflow over the boards. That really is the key to getting top performance out of these. What that means is, several of the sub-35Gh/s performers actually have further potential. BAL 8 is watercooled, btw.
Yep. I have a cheap-ass $40 Ebay water cooler on my new Chili; 36-37gh speed. However there is a secret. I wonder if I should say it or have people send me bitcoin for it. :-)
Fuck it, I can't not: Reduce the speed of the water pump and your cooling system will work much better. Reason is high flows impedes heat transfer, which is what you want. That's the difference between 33gh and 37gh.
C