I see something interesting in the latest study from Cambridge.


source: https://cbeci.org/mining_map

The "Average monthly hashrate share, Aug'21:" is ZERO for China, which we all know is bullshit.

So what happened?

Possibility 1:

Viabtc, Btc.com, and Poolin "lied" about their reports to Cambridge claiming that there wasn't a single mining gear with an IP address coming from China

Possibility 2:

ALL that's left from Chinese miners are now mining behind a proxy/VPN


Possibility 3:

ALL the miners in China were actually shut down.

I am certain that point 3 can't be it, so it's either 1 or 2, my guess would be that there are many miners still mining in China under the radar, the Chinese government isn't the most transparent, and corruption isn't unusual there.


The latest study puts the U.S at NO.1 with about 47% of the total hashrate.

I would love to add a small but very important piece of information, do NOT oversize your MCBs, it comes at a huge risk, the main purpose of the MCB is to actually protect the wire from overloading, some people think if the breaker trips you can just use a large one and all your problems are solved, that is NOT the case.

As for Phill's point, it's true, you do want to account for voltage drops, but IF the voltage drops too often and lasts for enough period of time that doesn't let you run an S19 on a 20A breaker, then your main concern would be the safety of the PSUs themselves, at 210V an S19 will draw 17A, which isn't bad for a 20A breaker since that drop should be temporary, so by replacing it with a 30A (assuming your wire size allowed it) it will run even at below 200v, but then your miners will RIP if that happens too often.

Not so optimistic after all ha ? , to me, we are just getting back on track, the last two difficulty change was just "not normal" with all things considered, so if we get 8% this epoch, or even 10%, it kind of just offsets the previous one, I think +4-8% increase every month will be the norm for months to come.

So, I have a crippled S17 pro that doesn't hash at full speed and it's the last standing S17 pro of my collection, so instead of having to keep watching that gear on the primary pool I use, I "for fun" decided to give Kano.is a try just about a month ago, and Hoorah, I see some fat balance in my account.

The amount this crippled miner made me on this pool is probably 4-5 months worth of mining on another pool (probably more, too lazy to do that math), anyway, this shows that joining a small pool can be very rewarding at times.

Congrats to everyone.

NICE!!!!!! congrats everyone, don't forget to donate a little to the address that Phill manages, we use that to fund the pool server to keep it running.



I am quoting this for future reference, I left positive feedback on your profile, it has been forever since I left any, but you deserve it, 375k worth of coins and you still paid everyone as promised, not so many people would do that, thanks for your honesty.

Not sure where you read that, but that isn't correct, the only thing you need to do when planning on buying Bitmain 17 series is to reconsider your decision because chances are you are going to regret it, I don't want to go into details since this topic is more of "electric setup" but you should really avoid getting those gears.


Ya, he will be limited to a few models, the most famous among those who have 277v is gears that use P21 PSU like the M20 and the M21s, the input voltage of that is 200v-277v, in fact, the overclocking function in the latest stock firmware requires a higher voltage than 240v, which is heaven on earth as far as those folks are concerned, the price of those PSUs, however, is just way too much, it's more expensive than buying two regular PSUs that run at 200-240v.

This sounds so strange to me lol, But I understand why. In my not so "capitalism friendly country" electricity is subsidized, it's super cheap that the peak and continuous load is almost identical, in the summer, ACs will be on 24/7, and in the winter electric heaters are on almost 24/7 too, so when the power company install any transformer or wiring, you never hear them talk about what's peak and whats continuous, it's crazy when I compare the situation here to the other countries.

Also another note, I see people in telegram talk about having 277v, not sure if that's just in the U.S or elsewhere, but that 277v range isn't mining-friendly either, many folks are stuck with 1-2 MicroBT models that can take 277v.

Well, there is nothing special about ASIC miners when it comes to electrical wiring, your friend needs to follow the same set of principles he follows elsewhere, you just have to give him the key information needed to run the miners and that will depend on what type of miners you are trying to put in that farm.

Bitmain gears (ignoring the old models) all use two C13 cables and consume on average 3kw, Whatsminer on the other hand, uses a single C19 connector and consumes anywhere between 3kw to 3.5kw depending on the exact model and the efficiency within the same model.

The majority of these ASIC miners are voltage sensitive, so if you are not sure about the stability of the voltage, you might ask him to install some sort of voltage protectors to avoid PSU damage.

The MCBs / fuses sizes and all the wiring will depend on the code of your country.

There is a bit of misconception in regards to the use of Escrow when it comes to buying a use ASIC miner, no decent and honest escrow will handle such a deal, unless

1- The shipment doesn't go straight from the seller to your address but instead stops at the escrwo's address.
2- The escrow person knows how to properly test all the gears to confirm which is working and which does not.

This creates even further issues because most of the trusted members who offer escrow services here know little to nothing about these ASIC miners and how to properly test them, plus the escrow fees will be a lot higher since they involve unpacking, testing, packing, and shipping to the final destination.

Also depending on the escrow's location, there will be large shipment fees which the buyer needs to handle, so all these factors combined makes buying a used miner either way too costly or otherwise, way too risky.

Uninstalling BO+ is a pain in the ass really, you will need to use their tool to get rid of it, the support team on telegram however are so professional and helpful, they will guide you through the problem, just post all the details you posted here in the telegram group at https://t.me/BraiinsOS.

You can also post in their topic , Artemis3 is pretty active there and he will assist you.

The kernel log is incomplete, please post the whole thing, also, does this error show up right after you start the miner or it hashes fine for a while and then throws this error? most of the issues the S19 pro are related to the power unit, if the voltage isn't stable between 220 and 240 or the PSU is placed too close to a wall or has some hot air close to it it will cause all types of issues.

But to be sure, I need to see the complete kernel log and an image of the status page.

Then download Whatsminer Tool and flash the latest firmware, there is a good chance that it will fix these false temp positives you are getting, you can also join Whatsminer Telegram group here > https://t.me/WhatsMiner, there is more related content and more folks who are experienced with MicroBT gears than we have in the forum since Whatminer isn't really as popular as Bitmain.

There is also a lot of room for improvement in regards to the software level, most of these custom firmware do way better than the stock, getting 10-20% more efficiency out of the same miner isn't something strange, with a good tuning on the S17 pro the difference between it and the S19 pro which uses a newer chip becomes so small, I can't believe that Bitmain does not have the skills that these individual custom firmware devs have, but it looks like Bitmain has not been focusing much on that aspect.

My guess is that starting from the next miner version which could very likely be a replica of the 19 series Bitmain will focus more and more on the firmware to try and squeeze every bit of efficiency they can from those chips.

Would love to hear your reasoning, I do agree that prices are likely to continue going higher to sub 100k without the difficulty being able to catch up, but then eventually the price will crash into a bear market like it always does, in other words, the good part of 2022 will likely be bearish, also, the average difficulty will most likely be higher in 2022 than it is in 2021, which suggests that the overall profitability for miners in 2021 is likely to be "as good as it gets".

https://www.bitrawr.com/difficulty-estimator

+3.5% increase in difficulty so far which should continue to increase, while the price is up about 8% from the opening price of last Monday which marked the opening of this difficulty epoch, at current prices and difficulty an S9 makes $5.7 a day, I still remember buying some of them for under a $100 bucks, they were making below a dollar a day back then, it's crazy how things have changed in the past two years, I wonder, if mining bitcoin will ever be as profitable as 2021?

If you know that you have what it takes and have all the time in the world, you could provide repair service and charge a premium, you will probably make a lot more money than actually mining, even if that doesn't make sense, it really makes no sense to buy a mining gear with such a high failure rate just because you can fix them, even if you think your time is free, wouldn't you rather watch some movies than having to fix a poorly built ASIC miner? besides, the time you are going to spend fixing them is time wasted not only for you but for the miner itself which would otherwise be generating revenue.



Assuming they will survive the overclocking for 2 months, which isn't something anyone would guarantee.

I can't think of any reason as to why would anyone (regardless of the circumstances in the world)buy any of those 17 series gears, if someone gives it to me for free, hell ya I'll take it, but will I pay half the price that gets me a Whatsminer or Avalon gear instead? hell, no.

LOL, so you took all the online advice and your buddy's and just dumped it all in the trash?? why would you do that? I have to sadly inform you that you are likely going to regret doing that, heck, I feel bad for getting those gears LONG before the reviews started coming out, I sure as hell would feel worse if I knew in advance that I was getting some shit-gear.

Don't even think about overclocking them, your experience with computers will not serve you once those gears go bad, it isn't a matter of gluing a heatsink, the chips themselves will go bad or become loose, identifying the chip/chips that need fixing require some special tools, acquiring the replacement chip from China is some serious pain on its own, fixing these mining gears isn't something the average joe with some computer background can fix, so chances are you will have to send them for repair, which is costly and takes forever to be done, assuming they will be in a fixable state in the first place.

Keep these gears as cool as possible, forget the overclocking thing all together, that's my advice.

The API logs won't show anything related to the issue, the best place to get temp info would be the syslogs.

OP, you should try to run the miner in "Low Power Mode" by going to the configuration tab > CgminerConfig> Power >, that should fix the issue if it's really related to the temperature.

No major upgrades since the 19.1 version you have, I don't think using an older Bitcoin core version will affect your mining operations, although the other obvious things such as sustained and reliable connectivity and availability might do, you could use a solo pool and pay a small fee, cksolo has a 2% fee, Viabtc charges 1%, a few other pools offer the same service, which is a lot safer than mining to your own node.

I do think they are colluding but in regards to keeping the difficulty low, it's obvious that all of these manufacturers make more/easier money selling mining gears than actual mining (the other small algos are all exceptions), of course, they do mine with a small portion of they make, but given that they don't control the majority of the hashrate, not even a considerable amount, I highly doubt they care about difficulty anywhere near to actually selling the mining gears.

On the contrary, keeping the difficulty low does allow them to sell their hardware for higher prices.