I sent you a PM

& Thanks for the clarification on the FW, it saves me flashing it

Im about to add a third hash board too I'd expect the file is still good to use? thanks btw Tupsu!

also on the topic about data cables if anyones still looking
http://bitcoinware.net/products/18pin-signal-cables-for-antminer-s5-s5-s7-with-length-of-120mm

not longer than stock but its a source for some looking

they also gave me a good deal on hash board with heatsink and pci-e Y cables for the project
if your looking try the contact page and send a mail

its recommended to run around 60 if I recall reading in a manual somewhere

I know that this is an old thread, however
I'm not sure thats a good temp running at stock speeds, I'm running at 400 and have temps at 55 and 59 for the two hash boards
getting a stable no error 1,436th/s average, I do notice the throughput drops to 1260th/s below 50 or above 65 temp, so the sweet spot is around 56-58
Im also running a 2440W dell server supply , with a cheap 120mm exhaust fan on the output, one more thing I noticed my temps run much lower when the miner is sitting on a flat surface with the bottom closed by at least 8 degrees lower