Antminer Z9 mini overclocked - page 23.

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Quote from: hawkfish007 on July 28, 2018, 08:19:49 PM

Quote from: Warlockks on July 28, 2018, 07:44:47 PM

Looks to me like the power supply failed on that hashboard. I would guess one of the FETs failed and took out the switcher.

You may be able to get it working again by removing the bad power supply chips, and running on just the remaining power supplies.

I sent the board for repair, but Bitmain said that the board is not repairable. I am getting a replacement board for $200.

Is that from Bitmain? I've never had to buy replacement parts, are they super high on shipping like for the antminers?

Also, it's been about 30 days of running this thing wide open and no issues

hawkfish007

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Activity: 895

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Quote from: Warlockks on July 28, 2018, 07:44:47 PM

Looks to me like the power supply failed on that hashboard. I would guess one of the FETs failed and took out the switcher.

You may be able to get it working again by removing the bad power supply chips, and running on just the remaining power supplies.

I sent the board for repair, but Bitmain said that the board is not repairable. I am getting a replacement board for $200.

Warlockks

newbie

Activity: 3

Merit: 0

Looks to me like the power supply failed on that hashboard. I would guess one of the FETs failed and took out the switcher.

You may be able to get it working again by removing the bad power supply chips, and running on just the remaining power supplies.

Captain Crypto Pants

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Hawkfish007 that is a nice setup!

What do you think about running my fan @50% constantly to keep the temperature under 60 degrees? I see that everyone else seems to let them run much higher closer to 70.

My Antminer A3 always ran hot, and wouldn't run overclocked at all. It's temps were always above 73 degrees. Where my L3s ran much cooler.

What is a comfortable temperature when running overclocked?

hawkfish007

hero member

Activity: 895

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I decided to test the mini 1 last time before sending it to Bitmain. I tested 1 hashboard at a time and and it turned out 1 of the board was causing the PSU to trip. After opening it up, found the burned hashboard. Mini is hashing fine with 2 good boards now. 3 other Z9s and 2 A9s in the same server case are running fine.

Server Case, it is vented on top with a 1500 CFM QC-ES-1500 fan.

lunobird

full member

Activity: 846

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This is a marathon not a Sprint. Especially in this bear market. No need to overclock it too high and risk getting 0 hash rate.

I had one time issue at 650 overclock at mid 70 temps. Would not hash or connect. kept going into jet engine mode. After a few hours it would hash again so I keep it at a conservative 625 overclock in 85 degree summer weather.

wedgenix

newbie

Activity: 27

Merit: 0

I ran at 650 out of the box, bumped up to 750 a couple weeks ago.

I abused it about as much as I could with daytime ambient temps that hit over 50°C in the mining room and a worst chip temp of 86°C, with chip temps no cooler than 77°C on the coolest of recent mornings. Average chip temps are 78°-80°C in an abusive environment and it's still chugging away.

The stupid high ambient temps I was experiencing are over now that I resolved exhaust heat issues, but I'm comfortable running these chips up to 80 all day long.
I suspect the guy that blew his up was also comfortable running at 80.

YMMV

h4lt

newbie

Activity: 1

Merit: 0

Also running at 750 since day 1 @ 60-70C with no issues. Averaging 16-17KSol/S

wh1ffer

newbie

Activity: 4

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Been on 750 since day 1 (june 25) no problems 60-70c

Captain Crypto Pants

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Activity: 123

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Quote from: hawkfish007 on July 20, 2018, 09:48:05 PM

Quote from: TGJ on July 20, 2018, 08:55:17 PM

Quote from: hawkfish007 on July 20, 2018, 08:33:23 PM

Quote from: jmigdlc99 on July 19, 2018, 11:52:46 PM

Quote from: Captain Crypto Pants on July 19, 2018, 12:06:38 AM

Update:

Still running errors free at 750M. Hashrate stays even but Zencash mined per day has dropped a little to 1.35 Zen a day. Probably due to new Z9s coming online. Getting closer to ROI.

It would be interesting and helpful to the community if one of these days you report to us if and when your Z9 ASIC dies. I would certainly find that useful information and reward you with some merit or some other way if possible.

Knowing the limits on these machines and why bitmain only shipped with lower default settings is a intriguing.

1 of my Z9 suddenly died, it was running at 750 MHz for weeks. It is now not responding after power up, no LED activity or fan spins. Tried with different working bitmain psu with no luck.

What were the chip temps?

Anywhere from 68-79 C depending on the time of the day.

To keep it cool I am running at 50% fan speed fixed in programming, the chip temperature is 57 to 60. After reading that yours was so high I am hoping mine will last..

hawkfish007

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Activity: 895

Merit: 504

Quote from: TGJ on July 20, 2018, 08:55:17 PM

Quote from: hawkfish007 on July 20, 2018, 08:33:23 PM

Quote from: jmigdlc99 on July 19, 2018, 11:52:46 PM

Quote from: Captain Crypto Pants on July 19, 2018, 12:06:38 AM

Update:

Still running errors free at 750M. Hashrate stays even but Zencash mined per day has dropped a little to 1.35 Zen a day. Probably due to new Z9s coming online. Getting closer to ROI.

It would be interesting and helpful to the community if one of these days you report to us if and when your Z9 ASIC dies. I would certainly find that useful information and reward you with some merit or some other way if possible.

Knowing the limits on these machines and why bitmain only shipped with lower default settings is a intriguing.

1 of my Z9 suddenly died, it was running at 750 MHz for weeks. It is now not responding after power up, no LED activity or fan spins. Tried with different working bitmain psu with no luck.

What were the chip temps?

Anywhere from 68-79 C depending on the time of the day.

TGJ

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Activity: 173

Merit: 5

Quote from: hawkfish007 on July 20, 2018, 08:33:23 PM

Quote from: jmigdlc99 on July 19, 2018, 11:52:46 PM

Quote from: Captain Crypto Pants on July 19, 2018, 12:06:38 AM

Update:

Still running errors free at 750M. Hashrate stays even but Zencash mined per day has dropped a little to 1.35 Zen a day. Probably due to new Z9s coming online. Getting closer to ROI.

It would be interesting and helpful to the community if one of these days you report to us if and when your Z9 ASIC dies. I would certainly find that useful information and reward you with some merit or some other way if possible.

Knowing the limits on these machines and why bitmain only shipped with lower default settings is a intriguing.

1 of my Z9 suddenly died, it was running at 750 MHz for weeks. It is now not responding after power up, no LED activity or fan spins. Tried with different working bitmain psu with no luck.

What were the chip temps?

hawkfish007

hero member

Activity: 895

Merit: 504

Quote from: jmigdlc99 on July 19, 2018, 11:52:46 PM

Quote from: Captain Crypto Pants on July 19, 2018, 12:06:38 AM

Update:

Still running errors free at 750M. Hashrate stays even but Zencash mined per day has dropped a little to 1.35 Zen a day. Probably due to new Z9s coming online. Getting closer to ROI.

It would be interesting and helpful to the community if one of these days you report to us if and when your Z9 ASIC dies. I would certainly find that useful information and reward you with some merit or some other way if possible.

Knowing the limits on these machines and why bitmain only shipped with lower default settings is a intriguing.

1 of my Z9 suddenly died, it was running at 750 MHz for weeks. It is now not responding after power up, no LED activity or fan spins. Tried with different working bitmain psu with no luck.

Tailgunner

jr. member

Activity: 81

Merit: 2

Quote from: jmigdlc99 on July 19, 2018, 11:52:46 PM

Quote from: Captain Crypto Pants on July 19, 2018, 12:06:38 AM

Update:

Still running errors free at 750M. Hashrate stays even but Zencash mined per day has dropped a little to 1.35 Zen a day. Probably due to new Z9s coming online. Getting closer to ROI.

It would be interesting and helpful to the community if one of these days you report to us if and when your Z9 ASIC dies. I would certainly find that useful information and reward you with some merit or some other way if possible.

Knowing the limits on these machines and why bitmain only shipped with lower default settings is a intriguing.

I'm fairly sure they underrated the mini's capability to not steal thunder from the big brother. One of the guys on this forum did a hardware/tech breakdown of the mini and suggested it likely has even more overclock potential than what Bitmain allows. I have a very strong suspicion that the non-mini is essentially just 2 mini's glued together with an increased stock clock speed. If true this means anyone expecting to get that same additional +60% OC will be disappointed

jmigdlc99

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Activity: 784

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Quote from: Captain Crypto Pants on July 19, 2018, 12:06:38 AM

Update:

Still running errors free at 750M. Hashrate stays even but Zencash mined per day has dropped a little to 1.35 Zen a day. Probably due to new Z9s coming online. Getting closer to ROI.

It would be interesting and helpful to the community if one of these days you report to us if and when your Z9 ASIC dies. I would certainly find that useful information and reward you with some merit or some other way if possible.

Knowing the limits on these machines and why bitmain only shipped with lower default settings is a intriguing.

Captain Crypto Pants

jr. member

Activity: 123

Merit: 2

Quote from: Tailgunner on July 19, 2018, 12:02:30 PM

Quote from: Captain Crypto Pants on July 19, 2018, 12:06:38 AM

Update:

Still running errors free at 750M. Hashrate stays even but Zencash mined per day has dropped a little to 1.35 Zen a day. Probably due to new Z9s coming online. Getting closer to ROI.

Which pool are you mining on? i'm only getting around 1.05/day zencash on Zhash.pro while cranked to 750.
Also I think there's supposed to be an upcoming reward decrease for ZEN soon if it hasn't happened already

Supernova pool

Tailgunner

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Activity: 81

Merit: 2

Quote from: Captain Crypto Pants on July 19, 2018, 12:06:38 AM

Update:

Still running errors free at 750M. Hashrate stays even but Zencash mined per day has dropped a little to 1.35 Zen a day. Probably due to new Z9s coming online. Getting closer to ROI.

Which pool are you mining on? i'm only getting around 1.05/day zencash on Zhash.pro while cranked to 750.
Also I think there's supposed to be an upcoming reward decrease for ZEN soon if it hasn't happened already

Captain Crypto Pants

jr. member

Activity: 123

Merit: 2

Update:

Still running errors free at 750M. Hashrate stays even but Zencash mined per day has dropped a little to 1.35 Zen a day. Probably due to new Z9s coming online. Getting closer to ROI.

Captain Crypto Pants

jr. member

Activity: 123

Merit: 2

I've cranked it up to 750 and it hasn't had any HW errors. I did set the fan speed to 50% just to make sure that it stays cool. 50% is 3,480 rpms and that keeps it right at 56-59 degrees.

It's been averaging 16.4 KSol/s for 2 days. Which equals 1.6 Zencash a day. Pretty happy with this little guy.

Hope it stays this way, at least until September when the big brother Z9s start shipping.

Tailgunner

jr. member

Activity: 81

Merit: 2

Been running on 750 with 0 HW errors since day 1, average hashrate is usually around 16.75k - 17k as reported by the pool. Some folks are reporting better hashrates at 725 for some reason, though I haven't tested that personally.

Topic: Antminer Z9 mini overclocked - page 23. (Read 26129 times)