Mining disaster with 34 L3+ ASICs, need some serious help!!!!

[Stubby5000]

You know, the Internet thing makes a bit of sense because the Ethernet switch for the garage is on the same outlet as that fan that stopped working. But would no internet connection really make the miners act this way? Not even boot up and show a red fault light? That doesn't seem right. However, it definitely is the one thing in common with all the garage miners. Even their power supply wasn't the same: some had 230v or 120v from the attic, some had 230v from the dryer circuit, and some had 120v from the rest of the house.

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[eddex]

It's a bit hard for me to explain this in English but sometimes the mains power grid "looses" the neutral (for example if a power supply line is damaged or a connection comes loose). On European mains power grid this means you can get 400V into some of your connected stuff. I don't know exactly how US mains power work, but I guess it's 3N~ 120V. If you got some of your machines connected to phase 1 coming in to your house and some connected to phase 2, the machines on phase 2 can get fried while machines on phase 1 can survive etc.

Another thing that can happen that I haven't seen mentioned in this thread is a router or switch fucking up and sending out mains power on your network cables. This is very rare of course but it can happen. Lots of the residential electrical appliances destroyed during a thunderstorm get fried from network cables and not mains power.

Again, this is hard to explain so I suggest talking to your power company and ask them if they've had any trouble, or ask a local electrician. The solutions for mains power in the US seem completely bizarre to me sometimes.

[GaryH]

it's been about 24 hours, did you check the miners, internet, power? 

[Stubby5000]

I'm going home this afternoon, will report back.

[Stubby5000]

Unbelievable! It WAS the Ethernet. What happened was I had a few heavy duty splitters on some of my 120v extension cords, and one of them tripped that happened to contain both that fan and my 24 port Ethernet switch. I didn't notice the switch was off in my panic right before I had to leave town. Up in the attic, a similar but unrelated thing happened where a 120v line went down that contained the switch up there. What a relief!!!! I'm back up and running as I type this. I shuffled some things around so this shouldn't happen again.

[xhomerx10]

Unbelievable! It WAS the Ethernet. What happened was I had a few heavy duty splitters on some of my 120v extension cords, and one of them tripped that happened to contain both that fan and my 24 port Ethernet switch. I didn't notice the switch was off in my panic right before I had to leave town. Up in the attic, a similar but unrelated thing happened where a 120v line went down that contained the switch up there. What a relief!!!! I'm back up and running as I type this. I shuffled some things around so this shouldn't happen again.

 So it was a very minor problem.  Good news for sure.

[Stubby5000]

YES. Such a relief.

[smoolae]

Good to hear!

[fmz89]

lol  20% OC

[zimmix]

Unbelievable! It WAS the Ethernet. What happened was I had a few heavy duty splitters on some of my 120v extension cords, and one of them tripped that happened to contain both that fan and my 24 port Ethernet switch. I didn't notice the switch was off in my panic right before I had to leave town. Up in the attic, a similar but unrelated thing happened where a 120v line went down that contained the switch up there. What a relief!!!! I'm back up and running as I type this. I shuffled some things around so this shouldn't happen again.

I think your internet is down.  Have you checked your internet connections?

Stubby, I think bitcoin9999 at least deserves one day of your mining redirected to his wallet! hahaha

I'm glad it's working, I can only imagine how bad you felt when you arrived home and $70k+ of equipments were out of work.

[seavey87]

I am glad you were able to fix this problem! Could you tell me how the OC is working for your L3s and what frequency you have them set to?

[davemanet]

I am glad you were able to fix this problem! Could you tell me how the OC is working for your L3s and what frequency you have them set to?

yes i'm wondering the same

[slovakia]

20% overload is hazard 

[Metroid]

First, most of the comments or reply you had here are stupid, second, if the circuit breakers were not tripped then it might be related to Brownout, if there was a short circuit then the circuit breaker would trip and the same goes to overload, Brownout mean that not enough electricity for all your asics is coming from the energy transformers but that would randomly turn off some machines and let others to be still working if there are 3 phase power. Brownout don't trip circuit breakers and damage a lot if it keeps trying to make the asics to work. You should have got a power monitor that trips the circuit breaker if not enough electricity is coming to your house. Brownout are bad for electronics in general.

If no internet then the reason why the red lights and why they were not working by the way, you should read about Brownout.

[Bulletdodger]

nevertheless, I told you guys not to OC these devices, I've burnt a couple of them by OC'ing and playing around with frequency. Now they're all XXX XXX
and no way back.

so be careful pls - a friendly advice.

[MnngSprvsr]

nevertheless, I told you guys not to OC these devices, I've burnt a couple of them by OC'ing and playing around with frequency. Now they're all XXX XXX
and no way back.

so be careful pls - a friendly advice.

how much you oc the l3+? 600 MH/s?
i think 8-10% are OK? or not? 540-550 Mh/s

[Stubby5000]

It was definitely a lack of internet connection that caused the problem. It was the red “fault” light that made me think it was something electrical, however if you test this at home, you’ll see this does indeed light up if you lack an internet connection. I would have figured this out but when I got home from work the wife and kids were waiting in the car, ready to leave town, so I had essentially no time to troubleshoot. So instead I churned with worry all weekend long, imagining the worst. I did begin to think it was the router towards the end of the weekend (it was the only common denominator) so it was such a relief to get home and see that router off.

With regards to overclocking, there is absolutely no doubt you can safely overclock 5-10%, or be like me and push the envelope a bit and go for 20-25%. I’ve been doing this successfully for months now with no ill effects, in a hotish attic no less. When you have lots of machines you will notice that some are more overclockable than others, due of course to the silicon lottery. Some machines will barely take a frequency of 425M, and others can approach 500M. Here are some numbers I’ve gathered. Take this with a grain of salt as these numbers came from just one machine.

384M - 504 MH - 810w
400M - 520 MH - 845w
425M - 555 MH - 905w
437M - 572 MH - 935w
450M - 590 MH - 965w
475M - 620 MH - 1020w
481M - 630 MH - 1065w
487M - 635 MH - 1070w

When you start approaching the limits of a particular machine, you will notice hardware errors accumulate very fast and your real time hashrate will be higher than your average. For me, when the difference is more than 20 MH/s, that’s the limit. I have some machines that can hash at 650+ MH/s.

[Stubby5000]

Incidentally, the D3 is not nearly as overclockable. At the very best I can get 20 MH/s, which is only 15% over stock. And most machines can’t reach 20.

[DrkLvr_]

200 AMP service doesn't mean 200 CONTINUOUS Amps. For continuous you should use 80% or 160 Amps maximum. Your electrician didn't mention anything like this?

[crypticj]

I was going to say internet/switch but glad you found the problem.