Transmission and distribution of electricity are very complex and very, very costly, just because you have excessive power at point A -- doesn't mean you can't be lacking the necessary power at point B, you can solve this problem if you throw enough money at it, but then transferring power will come at a great cost of money + a good amount of it will be lost in the transmission process, the person/s receiving it need to be able to afford all that extra cost added, or else, it doesn't make any sense to invest billions of dollars to send that power to the other side of the country.

Kengen isn't 100% owned by the government, so the shareholders will probably care more about how much money they can make than supplying the poor with electricity (the government too probably doesn't care), so it really makes no difference if 30% of the people have no electricity or even 70% of them, miners can bring their containers right next to the power source which means no Step-Up/Down transformers, no expensive transmission towers, which means saving billions of dollars.

Of course, I am not arguing if it's moral to sell electricity to foreign bitcoin miners while 30% of your own people are in the dark, freezing to death in winter and melting in the summer heat, of course, it's inhuman at best, but it seems like those 30% are poor and live somewhere in the countryside, so even if the company would transfer the power there, they will either not afford to pay for it, or not use even half of it, which gives the shareholders of the company the incentive to find other clients, it's pretty damn sad to see that some people in 2022 still don't have electricity at home, but it's what it is.

Ya in that case you are 100% correct, the only issue would be the size and the cost of the miner, which I believe could be worse than the noise issue, I think sidehacks  sums it up pretty nicely by saying


Keep in mind, that you are going to do all that knowing fair well that the number of such miners you are going to sell is going to be a fraction of the number you could sell if all you cared about was the cost to hashrate ratio.



I would imagine that in a college dorm power will be both free and limited, thus utilizing every bit of free energy would be a wise move, I mean 3th of Sha256 makes only dust, besides it won't be so cheap to buy, and the ROI will be instantly high, 35 cents a day isn't worth it, that person could save for a good GPU.

Most modern GPUs make over a dollar a day, they can use those GPUs for gaming, study, and design, even when they leave college, the GPU will still be somehow usable, I mean an RX 470 bought 7 years back can still run some solid games, do a bit of rendering, sell for somehow a good price, there are many people that would still use and buy that card, but not so many people who would buy an antminer S5 as far as I know.


I am not saying that having an ASIC miner run as a space heater is the worst idea in the world, but it only makes sense if you mod your own gear as phill does, I mean imagine you have an S9 with 1 or 2 dead hash boards, selling it for $100 will mean listing on eBay, shipping, dealing with all kind of annoying buyers/scammers, maybe even some tax-related matter, you don't have time for all that, mod the gear, make it run quiet, turn it on in the winter to make some sats, a brilliant idea.

That VS, paying $2000 for a good-looking factory-made quiet miner that makes you 50 cents a day, not so brilliant idea.

Did (whoever got your account) add 2FA ? there is a similar complaint, read it, might give you some clues.

With that being said, and regardless of the "not so perfect" way that Slushpool handles the authentication system, I don't think how any other pool would do any better in your situation, I mean, you don't have access to the payout address, you can't change the worker's name, all you supposedly have is an email.

To be honest, if I was running a pool and had 2 people claim they own the account, one had the username and password, and another had the payout address, I would assume the latter is the rightful owner and if both parties had access to the email address and the payout address, the last point I would use to judge would be judging who owns the mining gears mining to my pool.

But then every mining pool will have its' own judgment, but in reality, owning access to the mining gears is the only thing that matters, if someone manages to hack your pool account and your wallet, all you lose is the mining profit and whatever that wallet holds, but then owning the mining gear, you can just make a new account on the same pool or just a different pool and life goes own, but not being able to change the worker name is pretty much bad.

It means, either you are not the rightful owner (maybe you helped your friend set up his farm and now you want to steal his hashrate), it could also mean, you somehow managed to infect those miners with a virus you made which the owner isn't aware of, or in the best-case scenario, you are hosting your miners at the wrong place, regardless of how you look at it, not being able to instantly change the worker details on miners which you claim to own is worse than losing your Slushpool's account.

With that said, please keep in mind that I am not saying you are trying to steal your partner's hashrate, just trying to walk in the pool's shoes and to "justify" their actions, for all we know, your "partner" could have contacted the pool and proved ownership of the current payout address and in that case, the pool has more reasons to pass the account to him, if you want to beat him on that, they have offered you the last resort which is a prove of hardware ownership, you failed to do both, it's pretty fair that they don't give you the account IMO.

Temperature isn't exactly a huge issue, you need to move enough air fast enough, most mining gears will run just fine at 30c to 40c, it hardly gets above those temps in most places(it does go above 40c sometimes, but doesn't stay that hot for too long), but even then, a bit of underclocking will solve the issue.

The more difficult issue to deal with would be the humidity, mining in a humid place is a lot worse than mining in a hot dry place, which many people seem to overlook, moisture is worse than heat, especially if you live in coastal areas, saltwater will do more damage to your gears than temps, humidity is also a lot harder to manage than heat.

Anyway, the articles mentioned that


of course, we don't know how much they can spare, but just so you know bitcoin's current mining operations need about 15,000 MW, that's 118TWh a year.

Anyway, I think if someone wants to be "more green" would actually utilize something that lowers the carbon footprint, according to the University of Cambridge, the global gas flaring has the potential of generating 688TWh, as it stands, that's 500% more than what bitcoin mining needs, and by utilizing that, not only miners they get dirt cheap power, they will also reduce gas flaring emission that makes up about 6% of the total emission.

Some miners in the U.S have already started utilizing that "otherwise flared/wasted" gas, and I think more miners will be interested in doing something like that as opposed to sending their mining gears to Kenya, after all, "green" energy can't be that cheap.

I am sorry to hear about your loss, not trying to state the obvious, but most exchanges are scammers, let alone one that has to do with Jihan Wu.

Anyway, if you want your claim to get more exposure so that more and more people become aware of what happened to you with at Matrixport, I suggest you post a new topic in the scam accusation section.

Of course, he is, he is going out of his way to post the same post everywhere, I have tagged his account and also reported his posts for being off-topic (since the forum does not moderate scams), he is pretty clever to be honest, posting the correct link to Canaan while adding his telegram group/channel in the same post, hoping to catch some lazy folks who might want to place orders on telegram.

Sorry for my Spanish friends, I have to write this in English, this guy is a scammer, please be aware and do not open any links he posts/sends you in private.

hmm, I don't think the number of chips is relevant to cooling, see I am not a thermodynamics expert by any means, but my understanding is that heat is just a form of energy, so when "electrical energy" passes through the chips of the miner it will convert to " heat energy" of the same amount, so a 1000watts electrical energy will always create a 1000 joule regardless of how that  "electrical energy" is being utilized.

You are right about using more efficient chips at the best efficiency you can squeeze of them, but that will only allow you to get more hashrate for the same amount of heat, but consuming 2000w will always generate 2000j worth of heat, now it's up to you if you want to move the heat away or keep it inside the miner to get some siclon sauce, but you can't possibly cool a 2000w miner without noisy fans.

I believe by using the best noise to airflow ratio fans on any miner, you can't sleep in the same room with a miner that pulls anything above 600-700w, ok maybe add an extra 100-150w if you are a heavy sleeper but that's all about it, sleeping next to a 2000w miner is just close to impossible.

How are you getting 220v out of 3 phase? phase and neutral 220-240v phase to phase 380-400v?

Also, I think you mean a total of 2 gears per phase, so 10 amps for each miner, that will work just fine with S9s, but not with S19, you will need the whole 20amps breaker for one gear, in fact, if you push it towards the 6kw figure, even the 20 amp won't be enough, hope you are keeping this info in mind.

Great effort by the way, gave you more merit points for the efforts, I don't fully recall how the ranking system works, but I believe at this stage, you can post images directly on the forum by coping the .extension link and using the image icon above, here is an example of your breakers image

You are welcome, please keep this topic updated, it would be a great addition to the forum given the little info related to immersion cooling, also some pictures and more details about your setup will be apppricated.

I gave you some merit points to help you rank up so you can post with less resitctions.

I am sure you know this, but I would like to clarify to OP that a hashrate boost means a sacrifice of efficiency, when we say custom firmware is more efficient than the stock we are talking about (when comparing the same hashrate), in other words, if the stock firmware gives you 100th and 3100w, you could expect the custom firmware to give you 100th and 2900w or maybe lower, so you go down from 31w per th to 29w per th.

Now if you underclock the miner using custom firmware, you get even a better efficiency at the cost of losing hashrate, so maybe you can achieve something like 70th at 1600w, or 23w/th, which is a lot more efficient than the stock.

However, if you were to go to 120th overclock, then the efficiency of this setup will be less than the stock, you will also need to replace the PSU, if 130-140th is your target, then a 6kw is needed, pushing towards 160-180 will require an 8kw PSU, overclocking with the stock PSU is going to pretty limited.

Mining gears manufacturers make more, better and easier money when selling to industrial-scale miners, they don't even make those loud 1200-1500W gears anymore, it's all 3kw and above now, they know that mining is no more a home thing, and only large farms will afford to buy a dozen miners each, so give them what they want, a large farm rather manages 10000 gears of 3.5kw than 30000 of 1200w gears, also the manufacturer rather deal with 10,000 possible warranty claims, support, and shipment that dealing with three times the number.

So the majority of buyers are happy with these loud gears since they don't mine at home, the people that make them are even happier, why bother making a small miner? this will cause them many problems, 10k space heater miners will be bought by 10k people (maybe half the number of they are lucky), so instead of dealing with 1 client that can place a single order of 10k miners, you will need to deal 10k or 5k clients, many of which don't understand a damn thing about mining or/and how to set these little miners up.

Also, manufacturers are bottlenecked by chips supply, labor and time, so if you have 1 million chips, 100 engs, and 3 months, it makes a lot more sense to build something you have already built, you have clients that have already PAID upfront and a thing that is easier to build, why would you go out of your way to satisfy the average joe who wants to heat his bedroom while mining some sats? nobody is going to do that.

But even if someone else was going to do what you suggest, how would they exactly cool 1000W-2000W without moving enough air? and to do that you will end up using "load fans", the setup you are talking about is limited by the chip efficiency, with the current efficiency we have, any hashrate close to 20th will be in the 1200w range if using something like  BM1397, and then about 600w if using something like BM1398BB but will be extremely costly.

Maybe someone can modify the Apollo miner to give it a better look, maybe put double the chips to get 4-6th and improve the cooling, that might work, but again, will cost an arm and a leg to make, I think the best thing home miners can do for now would be to buy a few Apollo miners if they aren't happy with just one for a space heater.

Start building now and deploying gears after 2024 Q2 would be a good idea, at least, a lot better than those who are building now and expecting gears to arrive mid to late 2023, right before the halving, I think many people do not understand how brutal the halving can be, it's probably because of the myth that many people spread which says " difficulty will always follow profitability".

While the truth is, BTC went down 60%, difficulty went up like 36%, so we are now mining 36% less bitcoin that is worth 60% less in fiat value, the same thing will happen after the halving, there is no such thing as half the miners shutting down, people need to understand this or else, they are in for troubles.

We know the next halving is going to be somewhere in April 2024 or maybe earlier, which means, by the end of this year, it will be extremely risky to buy a mining gear, it's either you do it now, or a few months after the halving when gear prices would adjust to the new profit scale.

meanwhile, we are back to positive on the difficulty estimation

I have no experience with immersion cooling but I have tested both firmware in the past, and I personally think Vnish (asic.to / awesomeminer) is far better, although,Vnish is a modified bitmain firmware (originally Cgminer) while BOs+ is written from scratch and thus does not violate any license, but then "copyrights" aside, I would personally use Vnish over BOs.

But then again, everyone is different, you can try both and see what works best for you, the power saving on both firmware versions is pretty good compared to the stock firmware, it's good enough to justify the fees especially if your power rate is high.

The pool doesn't get a job from the network, the pool creates jobs for its miners, I think I understand where the confusion comes from, you need to understand how mining actually works, and to do so, let's just forget about pools, and pretend that there are just 10 miners mining bitcoin, so Satoshi mined the first block with a difficulty of 1 (does not matter how he did it) and now the 10 miners are trying to mine the second block.

The first block has a "block hash" and let's just pretend it's "2222" in this case, now every miner will take that number 2222, add a random number to it, then hash it into the sha256 function to hopefully produce a "hash" that has a certain amount of zeros in front which is the "difficulty", now for the sake of simplicity we will pretend the current difficulty is 1, or in other words, the hash needs to have 1 single zero in front to be taken as a successful block.

So now I take that hash of 2222 and put it into the hash function it gives me


Any leading zeros? nop, ok then I need a random number to it, and that random number is called NONCE.

let me try to add 1 after 2222, so I hash 22221

it gives me


no luck, let me add 2 after 2222 and hash 22222

it gives me


note: those hashes are real hashes, taking 2222 and adding all the numbers from 1 to 57 did not give me a zero, but then the number/nonce 58 gave me that, so if you hash 222258 you get this hash


You can confirm this or do a similar practice using this website > https://emn178.github.io/online-tools/sha256.html


So now when I hit this, I will broadcast to the network, and tell them, hey I found a block, it's hash is


The nonce I used was 58

everyone knows the previous block's hash was 2222, so they will hash 222258, if it really does start with 0, they will accept the block, and then use the new found hash to try and get another hash that starts with 0, until the difficulty changes and then they need to find a hash that starts with 00 or 000.

I think now everything about the basic mining process is clear right?

now imagine every one of these 10 people became a mining pool and has thousands of miners mining with him, it doesn't make any sense for everyone to start adding 1 and then 2 and then 3 to get to that 58 number which solved the block, everyone will be doing the same work, redoing the work the someone else did is pretty useless, as a pool operator I want the miners to try a different set of nonce/random number

I want to tell miner A, to start trying from 1 to 1000 , miner B to start from 1001 to 2000 and so on and so forth, but then I don't know if miner A will finish his 1000 tries in 1 second, it will also take a lot of recourses to allocated certain limits to every miner so what I do is, I don't send them the same work/hash

I send miner A 2222A I send miner B 2222B, this way I know even if they both start hashing 1,2,3,4 their results will be different and no duplicate work will happen.

So now, if miner B buys a large farm and I send him 2222B the total number of "digits" he can hash is limited, let's say it's only 5 digits so  2222B-----, he will do 2222B10000 and then 2222B10002, very soon he will reach to 2222B99999 and he has no more digits to change, the miner in this situation will need to change one of the parameters to open a new door of possibilities, so maybe he will do  2222BB----.

Miner B now has more chances than before because he can try more hashes, which means the pool as a whole has more chances, but miner A's chances are still limited.

The short version of this whole thing is that every individual miner has his own "job", in fact, every hash board of your miner or even every chip has its own work/job, mining to a pool does not change that, mining to a pool is like mining solo but with a promise/obligation to pay the other miners a % based on their hashrate contribution, and are also are under the same obligation, in the end, it's only 1 miner that finds the block, the pool system simply devices the profit between all miners based the hashrate.

In a solo pool like CK, the pool gives all the profit - fees only to the mine which found the block.

Please note:

** Changing a single digit in the input of the hash will give you a completely different hash, so hashing 2222B0000 will not be the same as 2222b0000
** Not only 58 solves the 2222 block, but there are dozen of other numbers that do so, it's all random, for an example 22221234 also has a hash with 0
** Miner B has more hashrate and can try more numbers in the same period of time compared to miner A, but that does not mean miner A can't beat him to the race, it's just that based on probability miner B is more likely to find a good hash

Finally, please keep in mind the above explanation of how the pool specifies different jobs to miners or how miners submit a block or what value do they hash and how they hash it, is an extreme oversimplification of the real process, there are many more parameters involved but by the understanding the above you will at least haveve a good clue and clear some (if not all ) of the confusion.

Before starting with the hex writing process, here is a simple fix that usually works with such errors.

1- unplug all hash boards from the control board
2- flash this firmware  > https://file12.bitmain.com/shop-product/firmware/Antminer-S9-all-201711171757-autofreq-user-Update2UBI-NF.tar.gz

when the flash is down, power the miner off, re-plug the hash boards, and power on.

if that version does not work try this version > https://file12.bitmain.com/shop-product/firmware/Antminer-S9-all-201705031918-550M-user-Update2UBI-NF.tar.gz

if that version does not work too, try this custom firmware > https://www.awesomeminer.com/download/firmware/antminer-firmware/Antminer-S9-awesome-3.9.tar.gz

You can do that, but that would contribute to more added latency which is something you want to avoid when mining, going from NH to sever 1 > server 2 > Mining pool might not work perfectly, it will certainly work but the number of stale/rejected shares might be a bit high which would result in an overall more expensive operation than it already is.

I still think using a decentralized pool is the best approach, from NH > P2Pool is going to be very low latency, without any added cost, if the government manages to get your details from NH, there will be little to nothing of info.

Check Braiins-OS by Slush, written from scratch and supports Asicboost, not sure what you mean by "straightforward" tho, it's unlikely that you will find a plug-and-play code that's up to date, all the fee-based firmware versions use bitmain's official firmware (originally CGMiner) and modify it to do more stuff like auto tuning.

You will only find scammers if your target price is 85$ for an S9, the average price for S9 is almost always it's monthly profit (before the power bill) * 3, right now it nets about 45$ so you are looking at about $135, but that's usually with an OEM psu, for APW3 you need to add 20-30$, to get the i or j version you are also looking to add a few tens of dollars on top, this has been the average way of pricing S9 since 2018.

If your order is large enough, you might get a bit more discount, also, the x3 figure drops a bit when it's a bear market and people have less desire to buy gears, and it goes up a bit when everyone is fomoing, but you can use it as a solid average, anyone selling far below that price is likely a scammer, anyone selling way above the price is just too expenisve.

Reading through the list of "why" one should mine with you, I found this


I can't help but laugh, oh and by the way, did you happen to repay the hacked amount?



The problem with this approach is that coinex has a minimum withdrawal of 0.001 BTC and a fee of 0.0001 BTC, even of other coins the lowest seems to be around $10 worth, so this sends you back to square zero, and honestly, if I had to, I rather keep my coins on the pool's wallet than the exchange's.


I have to side stompix's opinion here, if you really can't hit the minimum payouts for most pools, you are wasting your time and efforts.