Shit...looks like either bad PCIE connectors and/or low gauge wires used on the new PSU or some sort of very bad short on the PCB. Look like 3 hashboards per unit so a max of 200W per board? Two 6 Pins should handle that current fine even though its a bit on the high end, but not if they are using cheap 18-20 gauge wire.
Units look very dusty so something might have also shorted on high side which would cause that sort of burning/PCB damage.
Topic: Bitmain APW7 Electric Fire with Baikal BK X Units (Read 269 times)
honestly, i have 100's of APW3 s and have only had 1 ever die on me but an easy death not a firey one. I have 12 APW7 and already 2 have died. I don't like that PS at all.
Forgot to update this. The problem was never fully figured out. After breaking down the baikals that caught fire it appeared the ones that caught fire had a lot of dust in between the capacitors on the board. Since there was no conformal coating on these boards (guess Baikal wanted to save a buck or two per board), the dust piled up and during a humid month the dust and moisture allowed for a path of conductivity. I took all my baikals apart, cleaned them and applied conformal coating. I then went back to APW3++ PSUs for the baikals. Since then, no issues. I also haven't had any other APW7 fires with any other units.
would be interesting what baikal says to this issue
Damn man. You probably just got a crappy PSU =(
I don't believe in coincidences
That's horrible.....
I don't believe in coincidences
That's horrible.....
Biakal recommends ATX power supply. Not sure that has anything to do with it. Perhaps cleaner power from ATX.
Thanks guys on the responses/questions!
My farm runs on 3 phase 4 wire to the PDUs at 240volt, and then the PSU plugs into the PDUs.
I checked the PDUs and they are all checking in around 230-240volts at the receptacles.
I do profit switching with the Baikal BK X, so they range in power draw from 120watts to 630watts depending on which algo they are on.
The APW3++ is setup for up to 1600watts. Specs: https://www.eyeboot.com/antminer-apw3-bitcoin-power-supply.html
The APW7 is setup for up to 1800watts. Specs: https://shop.bitmain.com/product/detail?pid=00020180621115441375Ioit8oeJ06DE
I have one PSU per each miner and no PCI splitters are used.
I upgraded as the efficiency of the apw7 was 1-2% better than the apw3++ and I was able to buy the apw7 and sell the apw3 for about the same cost.
Today I went through and removed the apw7s from the baikals and re-installed the APW3++ PSUs instead.
However, all my other machines running the APW7 have not had any issues, a mix of Innosilicon D9, A9, S11 and Bitmain S9i.
I have an electrical engineer coming on Tuesday to see if we can diagnose the issue too.
Thanks for the feedback!
My farm runs on 3 phase 4 wire to the PDUs at 240volt, and then the PSU plugs into the PDUs.
I checked the PDUs and they are all checking in around 230-240volts at the receptacles.
I do profit switching with the Baikal BK X, so they range in power draw from 120watts to 630watts depending on which algo they are on.
The APW3++ is setup for up to 1600watts. Specs: https://www.eyeboot.com/antminer-apw3-bitcoin-power-supply.html
The APW7 is setup for up to 1800watts. Specs: https://shop.bitmain.com/product/detail?pid=00020180621115441375Ioit8oeJ06DE
I have one PSU per each miner and no PCI splitters are used.
I upgraded as the efficiency of the apw7 was 1-2% better than the apw3++ and I was able to buy the apw7 and sell the apw3 for about the same cost.
Today I went through and removed the apw7s from the baikals and re-installed the APW3++ PSUs instead.
However, all my other machines running the APW7 have not had any issues, a mix of Innosilicon D9, A9, S11 and Bitmain S9i.
I have an electrical engineer coming on Tuesday to see if we can diagnose the issue too.
Thanks for the feedback!
Were you using PCIE splitters?
Thanks for info.
I won’t say if it’s not broke dont fix it.
And I won’t say fool me once shame on you,
Fool me twice shame on me.
I will ask a few questions.
Power rating for new psu is?
Power rating for old psu is?
120 or 240 volts used?
Power draw on the baikal bx k units?
I won’t say if it’s not broke dont fix it.
And I won’t say fool me once shame on you,
Fool me twice shame on me.
I will ask a few questions.
Power rating for new psu is?
Power rating for old psu is?
120 or 240 volts used?
Power draw on the baikal bx k units?
A few days ago I swapped all my APW3++ PSUs for the new Bitmain APW7 PSU units on my Baikal BK Xs. After day one, I had an electric fire that melted one of the hashboards on a Baikal BK X unit. The next day two more Baikal BK X units end up with melted hashboards. All 3 damaged Baikal BK X units had APW7 PSUs, and all 3 had the far right dashboards melt. The other hashboards appear to be ok. I found 5 of the capacitors had fallen off the melted hashboards (see pics).
Anyone else having issues with either the APW7 PSUs or Baikal BK X (Giant X 10) units?
Here are some photos:
https://imgur.com/KOzZriE
https://imgur.com/8WR4u8J
https://imgur.com/cdMxMfT
https://imgur.com/Vz0WRvi
https://imgur.com/O6Z9ziy
https://imgur.com/JQgEpiX
https://imgur.com/DZVWcEy
https://imgur.com/Nl3h8Vq
https://imgur.com/fNjOOFy
https://imgur.com/nWoyA4k
https://imgur.com/KbqfjEE
Anyone else having issues with either the APW7 PSUs or Baikal BK X (Giant X 10) units?
Here are some photos:
https://imgur.com/KOzZriE
https://imgur.com/8WR4u8J
https://imgur.com/cdMxMfT
https://imgur.com/Vz0WRvi
https://imgur.com/O6Z9ziy
https://imgur.com/JQgEpiX
https://imgur.com/DZVWcEy
https://imgur.com/Nl3h8Vq
https://imgur.com/fNjOOFy
https://imgur.com/nWoyA4k
https://imgur.com/KbqfjEE
Jump to: