Quote from: nox_ on July 17, 2014, 03:55:31 PM

Quote from: Zelek Uther on July 17, 2014, 05:58:01 AM

Quote from: Zelek Uther on July 10, 2014, 10:56:51 AM

Quote from: Shaolino on July 10, 2014, 10:21:35 AM

Hello, I have the same problem as Zelek Uther mentioned here before. The miner starts hashing and then slowly dies after a few minutes.
After rebooting I can start it again with the same result....after a few minutes it just stops hashing.
Any ideas ?

I still have this issue on one miner. I've tried different SDCards, different firmware (including Debian Desk from a forum user), I have even swapped out the RaspPi. Still have the same issue where cgminer fails with a segmentation fault. I see this by invoking cgminer from the command line.

What I'm trialling now is running just one module at a time. I unplugged the PCIe cable from every module except the first one, and it ran fine on one module for 24 hours. Power down, try the same with just module 2... and so on. I run each for at least 24 hours as a test. Still working through this. Then I'll try two modules... then three etc until I can run stable with as many as possible.

I've run each module by itself, then combinations of two, then three, and finally have it hashing stable on four modules.

So the result of my troubleshooting is that I have to leave one module unplugged (PCIe cable disconnected).

What PSU are you running for the five modules?

I bought three 1 TH/s units (each had five modules) and originally I had three broken backplane boards which were replaced. I then had the issue of four boards running at full speed with one at 25 - 29 GH/s.. This was fixed by replacing the stock 1000W PSU with a 1250W PSU then putting the miner into 'turbo moderate' - This kicked the final module into life, cleared my segmentation faults and I am hashing at 1 - 1.1 TH/s on two of the units.

Still need to solder on a capacitor to one of the replacement miner boards I received (had to ship two back for repairs) as they arrived with broken heatsinks :-(

I've got 4x 1TH/s Desks (5 modules) each has the stock Antec 1000W PSU.

I could try a higher W PSU to see if I can get that last module stable, thanks for the idea. Trouble is I'd have to buy one, I have none spare at the moment.