Mikestang
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May 11, 2016, 06:35:39 PM |
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Interesting and as always a pity that they do not tell us what they have changed.... Like Caanan said, all bitcoin related software should be 100% open source so everyone can see what is going on.
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yslyung
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Activity: 1500
Merit: 1002
Mine Mine Mine
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May 11, 2016, 07:29:16 PM |
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OuCh ! Not mine, just sharing . . .
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JaredKaragen
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Activity: 1848
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My AR-15 ID's itself as a toaster. Want breakfast?
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May 11, 2016, 07:33:45 PM |
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OuCh ! Not mine, just sharing . . . what was his power supply? and more importantly; how overloaded was his power supply line to fry ALL of the boards like that.....
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suchmoon
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Activity: 3808
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https://bpip.org
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May 11, 2016, 07:39:30 PM |
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what was his power supply? and more importantly; how overloaded was his power supply line to fry ALL of the boards like that.....
It's not clear if the boards are fried... looks like the PCI-E connectors melted due to thermal runaway. At least the warranty sticker is intact
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HagssFIN
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Activity: 2464
Merit: 1710
Electrical engineer. Mining since 2014.
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May 11, 2016, 07:48:03 PM |
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yslyung: What was the PSU and the wire gauge?
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Mikestang
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Activity: 1274
Merit: 1000
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May 11, 2016, 08:23:05 PM |
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Either he managed to unplug one of the 9 melted pci-e plugs, one of them didn't overheat, or he was only using 8 of them (note middle plug on top board). All in all it's probably user error.
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HerbPean
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Activity: 1638
Merit: 1005
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May 11, 2016, 08:26:48 PM |
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elrippo
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Activity: 1008
Merit: 1001
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May 12, 2016, 05:03:07 AM |
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You can use it for parts though
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scyth3
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May 12, 2016, 05:18:54 AM |
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Solder the wires directly onto the board and continue mining.
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adaseb
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Activity: 3878
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Up to 300% + 200 FS deposit bonuses
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May 12, 2016, 05:40:22 AM Last edit: May 12, 2016, 05:57:54 AM by adaseb |
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Its not a PSU fault, the miner probably overheated and melted some solder or a heatsink fell apart and shorted something out.
Each blade uses like 400 watts so using 2 pcie wouldn't of caused this.
Looks like they lowered the price to exactly 1 BTC after the coupons expired.
Price: 450 USD ( 1.005 BTC )
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JaredKaragen
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My AR-15 ID's itself as a toaster. Want breakfast?
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May 12, 2016, 12:18:39 PM |
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Its not a PSU fault, the miner probably overheated and melted some solder or a heatsink fell apart and shorted something out.
Each blade uses like 400 watts so using 2 pcie wouldn't of caused this.
Looks like they lowered the price to exactly 1 BTC after the coupons expired.
Price: 450 USD ( 1.005 BTC )
See; now that's a reasonable price; period. I may order one even though I don't have the power supply to run it quite yet. I already had to shut off all my scrypt miners and some of my S3's to lighten the load on my power connection. As far as that miner above; The only way to get that kind of thermal runaway is to either be undervolted on the supply line; overdrawn on your supply line, insufficient power supply wattage, or not enough plugs from power supply to miner. I am starting to think all 3. Also; They may draw 400W each; but overclocking or running the machine close to 75+* is a beast to consider.
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klondike_bar
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Activity: 2128
Merit: 1005
ASIC Wannabe
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May 12, 2016, 03:16:17 PM |
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Its not a PSU fault, the miner probably overheated and melted some solder or a heatsink fell apart and shorted something out.
Each blade uses like 400 watts so using 2 pcie wouldn't of caused this.
that stil would not explain all three failing - the shorted board would fail, but its unlikely all tree boards shorted at once and long enough to do this damage before killing the PSU those look like garbage 18-20awg wires, but again - this should have failed on the board with two connectors long before the ones with three. If i had to make a guess, i would say its related to the polarity, perhaps a custom wiring job gone wrong. Im not sure though if the S7 would force such a massive power draw though in that scenario? even the connector on the controller burnt up. I dont think its a problem with the S7 - this looks like the result of a server PSU conversion where the wires were done wrong, and a GND or 12V wire was in the wrong pin, or shorted out in the breakout board/soldering
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JaredKaragen
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My AR-15 ID's itself as a toaster. Want breakfast?
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May 12, 2016, 03:52:14 PM |
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that stil would not explain all three failing - the shorted board would fail, but its unlikely all tree boards shorted at once and long enough to do this damage before killing the PSU those look like garbage 18-20awg wires, but again - this should have failed on the board with two connectors long before the ones with three.
If i had to make a guess, i would say its related to the polarity, perhaps a custom wiring job gone wrong. Im not sure though if the S7 would force such a massive power draw though in that scenario?
even the connector on the controller burnt up. I dont think its a problem with the S7 - this looks like the result of a server PSU conversion where the wires were done wrong, and a GND or 12V wire was in the wrong pin, or shorted out in the breakout board/soldering
agreed. user error IMHO. Only time I get heating up plugs is insufficient power supply wattage, or low line input voltage due to an overloaded power line to the miner's supply. I have had two coolmax 1600W power supplies fail on S7's..... They are rated to put out 110A of 12V and 50A of 12V (12V#1, &2 as per the sticker on the power supply) What they fail to mention is 12V#2 is only supplying the SATA plugs and the motherboard plugs.... so you are limited to 110A in reality. And when you have all those PCIE plugs hooked to a board; well; I have two power distribution daugehter boards that have caught fire and half melted down. I since have started lopping off the motherboard power plugs and attaching PCIE plugs to them to power a single hashing board. This has balanced out the power draw in the supply and there has been no problem since... So; Its can easily be user error.
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elrippo
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Activity: 1008
Merit: 1001
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May 12, 2016, 04:46:52 PM |
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Its not a PSU fault, the miner probably overheated and melted some solder or a heatsink fell apart and shorted something out.
Each blade uses like 400 watts so using 2 pcie wouldn't of caused this.
Looks like they lowered the price to exactly 1 BTC after the coupons expired.
Price: 450 USD ( 1.005 BTC )
Hard price for a used unit
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elrippo
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Activity: 1008
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May 12, 2016, 04:48:42 PM |
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that stil would not explain all three failing - the shorted board would fail, but its unlikely all tree boards shorted at once and long enough to do this damage before killing the PSU those look like garbage 18-20awg wires, but again - this should have failed on the board with two connectors long before the ones with three.
If i had to make a guess, i would say its related to the polarity, perhaps a custom wiring job gone wrong. Im not sure though if the S7 would force such a massive power draw though in that scenario?
even the connector on the controller burnt up. I dont think its a problem with the S7 - this looks like the result of a server PSU conversion where the wires were done wrong, and a GND or 12V wire was in the wrong pin, or shorted out in the breakout board/soldering
agreed. user error IMHO. Only time I get heating up plugs is insufficient power supply wattage, or low line input voltage due to an overloaded power line to the miner's supply. I have had two coolmax 1600W power supplies fail on S7's..... They are rated to put out 110A of 12V and 50A of 12V (12V#1, &2 as per the sticker on the power supply) What they fail to mention is 12V#2 is only supplying the SATA plugs and the motherboard plugs.... so you are limited to 110A in reality. And when you have all those PCIE plugs hooked to a board; well; I have two power distribution daugehter boards that have caught fire and half melted down. I since have started lopping off the motherboard power plugs and attaching PCIE plugs to them to power a single hashing board. This has balanced out the power draw in the supply and there has been no problem since... So; Its can easily be user error. I tend to use material provided by the manufacturer, becuase i suppose they know what they are doing and using, so i do not want to use some server- or desktop PSU's for this type of application
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JaredKaragen
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My AR-15 ID's itself as a toaster. Want breakfast?
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May 12, 2016, 05:00:45 PM |
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Yeah; It was safe to assume this power supply model was overrated, but it was literally underrated.
I have picked one up for myself at $100; It had the same power distribution board fried. I did some magic soldering work and was able to keep the power distribution and not have to solder the modular PCIE cables directly to the PSU...
Blockchainmines did a test; and the bitmain 240V ecu actually ends up sucking more wattage than a gold rated 1600w brand-name PSU...
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notlist3d
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Activity: 1456
Merit: 1000
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May 12, 2016, 06:04:04 PM |
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that stil would not explain all three failing - the shorted board would fail, but its unlikely all tree boards shorted at once and long enough to do this damage before killing the PSU those look like garbage 18-20awg wires, but again - this should have failed on the board with two connectors long before the ones with three.
If i had to make a guess, i would say its related to the polarity, perhaps a custom wiring job gone wrong. Im not sure though if the S7 would force such a massive power draw though in that scenario?
even the connector on the controller burnt up. I dont think its a problem with the S7 - this looks like the result of a server PSU conversion where the wires were done wrong, and a GND or 12V wire was in the wrong pin, or shorted out in the breakout board/soldering
agreed. user error IMHO. Only time I get heating up plugs is insufficient power supply wattage, or low line input voltage due to an overloaded power line to the miner's supply. I have had two coolmax 1600W power supplies fail on S7's..... They are rated to put out 110A of 12V and 50A of 12V (12V#1, &2 as per the sticker on the power supply) What they fail to mention is 12V#2 is only supplying the SATA plugs and the motherboard plugs.... so you are limited to 110A in reality. And when you have all those PCIE plugs hooked to a board; well; I have two power distribution daugehter boards that have caught fire and half melted down. I since have started lopping off the motherboard power plugs and attaching PCIE plugs to them to power a single hashing board. This has balanced out the power draw in the supply and there has been no problem since... So; Its can easily be user error. I tend to use material provided by the manufacturer, becuase i suppose they know what they are doing and using, so i do not want to use some server- or desktop PSU's for this type of application I have had really good luck with this aswell. Just buy a APW3-12-1600 when purchasing a S7, and so far no problems. You know by buying them the PSU was designed with the miner in mind. Most likely that coolmax did not have a S7 in mind when designing it. On S5 and older I did use high quality ATX PSU's. But now I am using APW3-12-1600 on S7's and then go into a PDU.
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elrippo
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Activity: 1008
Merit: 1001
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May 12, 2016, 06:22:19 PM |
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that stil would not explain all three failing - the shorted board would fail, but its unlikely all tree boards shorted at once and long enough to do this damage before killing the PSU those look like garbage 18-20awg wires, but again - this should have failed on the board with two connectors long before the ones with three.
If i had to make a guess, i would say its related to the polarity, perhaps a custom wiring job gone wrong. Im not sure though if the S7 would force such a massive power draw though in that scenario?
even the connector on the controller burnt up. I dont think its a problem with the S7 - this looks like the result of a server PSU conversion where the wires were done wrong, and a GND or 12V wire was in the wrong pin, or shorted out in the breakout board/soldering
agreed. user error IMHO. Only time I get heating up plugs is insufficient power supply wattage, or low line input voltage due to an overloaded power line to the miner's supply. I have had two coolmax 1600W power supplies fail on S7's..... They are rated to put out 110A of 12V and 50A of 12V (12V#1, &2 as per the sticker on the power supply) What they fail to mention is 12V#2 is only supplying the SATA plugs and the motherboard plugs.... so you are limited to 110A in reality. And when you have all those PCIE plugs hooked to a board; well; I have two power distribution daugehter boards that have caught fire and half melted down. I since have started lopping off the motherboard power plugs and attaching PCIE plugs to them to power a single hashing board. This has balanced out the power draw in the supply and there has been no problem since... So; Its can easily be user error. I tend to use material provided by the manufacturer, becuase i suppose they know what they are doing and using, so i do not want to use some server- or desktop PSU's for this type of application I have had really good luck with this aswell. Just buy a APW3-12-1600 when purchasing a S7, and so far no problems. You know by buying them the PSU was designed with the miner in mind. Most likely that coolmax did not have a S7 in mind when designing it. On S5 and older I did use high quality ATX PSU's. But now I am using APW3-12-1600 on S7's and then go into a PDU. +1 AGREED --> me the same doing
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kaltar
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May 17, 2016, 08:25:12 PM |
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I`m in the same boats as alot of you. DOA board on one of my S7, they`ve received my board 3 weeks ago, and i still don`'t have shipping label for it. they tell me they found the board and did the repair on it, 2 weeks later i contact them again and they tell me, no repairs are not done yet, it takes a few days. It`s BEEN 3 WEEKS for F... sake. and now i got another blade that died, it`s still under warranty but that one is going to Denver. even if if i got to pay for it.
i will NEVER NEVER buy from bitmain again. i bought 5 S7 and so far, 1 x DOA full S7. 150$ to send back and 1 month to get it back 1 x DOA board, 75$ and still in limbo 1 x board died, this one going to denver
not a very good tracking records and very poor RMA service. and all the ignores from them and run around.
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smaxz
Sr. Member
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Activity: 430
Merit: 253
VeganAcademy
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May 17, 2016, 09:49:50 PM |
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wow bum luck bro.. i just about did everything i could to kill mine and its going strong.
after a few hiccups for sure but nothing i could not work around.
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- NGdTwHRSdnThdi1drQuHGT3khAHRtZ1HMq -
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