Quote from: Zich on December 02, 2014, 01:32:23 AM

Quote from: PaulLaughton on December 01, 2014, 01:59:19 PM

Quote from: marto74 on November 28, 2014, 11:12:00 PM

Just one thing run it @ about 300/840

I've hacked together cables to run all three from a single psu, using all the 12v lines from all the unused sata and peripheral cables to gain the extra pcie cables it needed. I've had it running for a while at that setting without getting too hot.

I had problems with the raspberry pi not detecting all of the miners at the same time (each worked individually) and some of the other usb devices working erratically when all were connected via one hub, so I swapped that for a powered hub which improved things except still only detecting two miners, connecting the miners via a second powered hub fixed it.

What kind of USB HUB?
You need to find USB hub that use MTT chips. STT chip can't work fine.
There are many cheap powered usb hub that use MTT chips.

It doesn't specify on them what chips the hubs use. One is of the Pi Hut's own brand, the other branded Cerulian from Maplin, both are 7 port with 2 amp supplies (though I have both powered by the ATX PSUs that power the miners). The way it behaved seemed to be down to lack of power on the USB bus rather than incompatible hardware as when I added the second powered hub, everything worked. As I am typing this I have 3 HEX16Es, a HEX8A1 and a Gridseed Dualminer all connected to the same Pi, all running stably using cgminer.