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Bitcoin / Mining support / Re: Antminer S2 -- just crapped out on me -- help -
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on: August 06, 2014, 04:33:34 AM
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I am sorry I am very confused with what you mean by 12 pin connectors. There is a total of 6 6-pin PCI-E connectors on the motherboard, so any PSU with about 1200W or 1250W and 6 PCI-e connectors would work. Some of them come with 8-pin PCI-E connectors but that can be solved easily by grabbing an adapter. Make sure that the one you choose has all power available on 12V rails. As for examples: Thermaltake, Corsair, Cooler Master, EVGA, BFG, etc. Note that new units are quite costly. I personally grabbed a used PSU from eBay. There is always a risk to get a defective unit (both new and used) but you will now quickly  |
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Bitcoin / Mining support / Re: Antminer S2 -- just crapped out on me -- help -
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on: July 31, 2014, 09:13:52 AM
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if the miner starts up and shuts down, it is almost certainly bad PSU. You do not need to wait for it to cool down for more than 5 min. Just take out the power cord, take out and reinsert the jumper, and you can start the system again.
The easiest check is to remove one or two blades, and if it works at 80-90%, then grab a more powerful PSU and you will be fine. They did a very bad job putting in 1000W PSU when the system requires over 900W.
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Bitcoin / Mining support / Re: Antminer S2 both found dead this morning
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on: July 18, 2014, 07:09:16 PM
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It did not overheat. The power supply just could not handle the load and shut itself off.
It is a standard problem with the stock supplies: they run at the very very limit of their capacity.
You have three options to avoid this in the future:
1. Run in a cooler room
2. Slightly reduce the frequency, say from 196 to 190.
3. Upgrade to a more powerful PSU, say 1200W
Good luck!
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Bitcoin / Mining support / Re: Revive a Dead Antminer S2 with Beaglebone Black Rev. C (off the shelf)
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on: July 18, 2014, 02:24:48 AM
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Hi everyone,
Just to confirm that this approach works. A power surge killed off my beaglebone (no blue light on it). I bought a Rev.B on Amazon (it is cheaper than Rev.C and the only difference is the amount of onboard memory).
Booted up the new BBB and checked that it works: connected the power through USB cable, accessed the web-interface.
Then I shut it down, inserted the SD card with S2 image. It booted immediately from the SD card - no hassle.
After that, I inserted it into the S2 and it works flawlessly.
Good luck everyone!
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