Your cooler seems excessive, the general notion over at the Eu-thread is that the chips like to run hot, Even bitfury himself has stated this. Just for reference Im running mine without fans in 25-33c ambient.
Hm...thanks for the tip. Odd that it works out that way. At work and will run a quick test to see when I get back. Currently however, it seems to be running fine at my pool, but if a couple degrees up will increase the speed, it is an adjustment worth making considering.