AndersAA (OP)
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January 23, 2014, 12:46:02 PM |
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Got a ASICMiner Block Erupter Cube today but it only powers up for two seconds, then switches off I know this is usually a problem with insufficient power but my Corsair AX860 has 71A on the 12v rail and has been confirmed running TWO cubes, so I wonder why it won't run one ... It uses a 6+2 pin PCI-e connector (obsiously with the extra two not connected anywhere). The PSU runs fine with "the paperclip trick" but once connected it powers off. What could be the problem?
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samesstee
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January 23, 2014, 01:04:16 PM |
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have you tried running something else with the PSU?
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pixl8tr
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January 23, 2014, 01:04:39 PM Last edit: January 23, 2014, 01:21:02 PM by pixl8tr |
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Do you have the AX860i by any chance? They use a "smart" chip that occasionally wrongly detects an over voltage during startup on some cubes and shuts down the power supply. I had the same thing happen with my AX1200i.
There was a workaround for the AX "i" versions that included a 1000uF 16V capacitor across the PCI-E power leads to help with the power-on surge voltage spikes. I couldn't find the original post but it was also discussed in the Cube setup thread.
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who | grep -i blonde | date; cd ~; unzip; touch; finger; bjobs; uptime; strip;. grab; mount; yes; umount; sleep; brun; Donations: 18ByQvDUmaMKkQbYvUWmnPSu9BWeNxVMoc
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HellDiverUK
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January 23, 2014, 01:21:33 PM |
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Same problem with a CX750 here. Solution was to use an elcheapo OCZ 600W.
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AndersAA (OP)
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January 23, 2014, 01:32:32 PM |
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It powers up a hard drive just fine but when I connect the second plug on the cube... It powers off. I suppose it could be a safety thing though... but it's just a plain AX860 as far as I can see on the box and PSU.
Could it be the fuse?
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AndersAA (OP)
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January 23, 2014, 02:06:16 PM |
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Eish :/
I found a way to get it started that works... But I really don't like it!
If I plug in the fuse AFTER giving it power it turns on just fine (But obviously some rather terrifying sparks from the fuse plug when plugging it in:( ) - anyone know of a better way? And why does this work??
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Gator-hex
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January 23, 2014, 02:37:16 PM |
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Eish :/
I found a way to get it started that works... But I really don't like it!
If I plug in the fuse AFTER giving it power it turns on just fine (But obviously some rather terrifying sparks from the fuse plug when plugging it in:( ) - anyone know of a better way? And why does this work??
Like the others have said it's power on over volt protection. Swap the power supply for another brand is the best solution. Or wire a switch to the green and black wires where you insert the paper-clip. By the way it's only 5v running over the paper clip you should get less sparks there if you want to insert/remove that. Give it a try and see if adding a power on/off switch there would work. If that don't work you could wire a circuit breaker to the fuse holder to switch it on/off without the sparks.
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AndersAA (OP)
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January 23, 2014, 03:51:58 PM |
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Eish :/
I found a way to get it started that works... But I really don't like it!
If I plug in the fuse AFTER giving it power it turns on just fine (But obviously some rather terrifying sparks from the fuse plug when plugging it in:( ) - anyone know of a better way? And why does this work??
Like the others have said it's power on over volt protection. Swap the power supply for another brand is the best solution. Or wire a switch to the green and black wires where you insert the paper-clip. By the way it's only 5v running over the paper clip you should get less sparks there if you want to insert/remove that. Give it a try and see if adding a power on/off switch there would work. If that don't work you could wire a circuit breaker to the fuse holder to switch it on/off without the sparks. A switch for the "paperclip"(actually thick insulated copper wire that fits perfectly) probably wouldn't work any better, since using the switch on the PSU has the same result, but a switch for the fuse might. I still don't see why inserting the fuse when the other wires are live actually works though? Is it because the voltage increase is lower than starting it all at once? Is there any danger to the unit?(except minor electrocution from the sparks if handled carelessly)
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Gator-hex
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January 23, 2014, 04:04:37 PM |
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It might work because the power supply is already switched on by the time you flip the paper-clip switch.
The power supply seems to be checking for a short when it's switched on. Sees a high load and goes.. "ah ha! A short!" ..and turn itself off.
Honestly it's not fit for purpose, you shouldn't need to be soldering capacitors for it to work, I'd return it if you only just bought it a and get a different make.
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AndersAA (OP)
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January 23, 2014, 04:13:24 PM |
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Well, since it's a great PSU and I got it for a great price I'd actually rather keep it and use it for my server once the cube turns into an expensive heater Besides, hopefully I'll only have to restart it... never. According to the cube it's running at 95% efficiency on high clock = 36-38Gh/s at the moment.
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NecroBones
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January 23, 2014, 07:51:09 PM |
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Have you attached an additional load? Some PSUs have issues with staying on without an expected load on one of the other outputs, like plugging a CD drive into one of the molex connectors.
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AndersAA (OP)
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January 23, 2014, 11:47:26 PM |
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I tried with an old IDE drive that should take some power but it didn't seem to be enough - maybe if it was on the same port it might have. Now it's been been running for over 9 hours at ~95% efficiency so I'm starting to consider my black hat trick a success, though I wouldn't recommend anyone else doing it... It looks like a great way to damage something considering what a little bit of static electricity can do to a complicated circuit.
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miaviator
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It's for the children!
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January 24, 2014, 12:16:06 AM |
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AX1200
4 cubes
zero issues
Burn Cheap power supplies Burn!
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AndersAA (OP)
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January 24, 2014, 12:17:49 AM |
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AX1200
4 cubes
zero issues
Burn Cheap power supplies Burn!
AX860... Cheap? *Cough*
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miaviator
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Activity: 686
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It's for the children!
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January 24, 2014, 12:28:01 AM |
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AX1200
4 cubes
zero issues
Burn Cheap power supplies Burn!
AX860... Cheap? *Cough* Different issues. I'm not a fan of the lower level corsairs though. I actually had an issue similar to this where adding new cubes to the PSU hot would cause one cube to stop working. The solution was to turn the power supply off then on again with all the cubes connected
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BitDucho
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January 30, 2014, 06:48:38 PM |
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Hi, I had (yes just had) the exact same issue and the Paper clip switch WORKs!! I really can't understand why but it does. This is what I did: As usual I would turn on the Ax1200i and seconds later an audible sound followed by the red self-test light and everything would be powered off. Following the suggestion I took some pliers, removed the paper clip and re-inserted it and… Eureka! Thanks for the suggestion, I now have 3 overclocked cubes on my AX1200i working with a silence never before experienced. THANKS
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