You could measure the voltage across all three board at the edge of the busbar, but honestly, I don't have enough knowledge about that PSU to confirm if that will be a sufficient and accurate test, I still think the best approach is swapping the PSU, it's not that hard, it takes like 5 mins or so.

It's unlikely that you are going to need a new control board, flashing these gears with an SDcard is a bit tricky, some sdcards just don't work, you need to try a few of them before giving up, try the one with the small size, also, make sure you are following the instructions step by step.

In most cases, when the kernel log says hash board x found 0 Asics, it simply means the board is dead, it either has a dead chip somewhere or another burned component, in other rare cases a bad PSU will cause this error, the PSU needs to supply enough power to those hash boards in order for them to function and report the correct asic count, sometimes when the PSU is faulty but not completely dead (it only supplies 12v to the control board) you might get this 0 asic error.

So long story short, try swapping the PSU and see if you get lucky.

This is a bitcoin mining-related section, take your political shit elsewhere, just because it mentions the word "mining" twice, it doesn't mean it belongs here, I don't see how anyone interested in mining would benefit from reading this article.

Where did you attach the photos to? i can't see them.

Anyway i think your PSU is dying and it can't run three hash boards so when you discconected one of them the miner worked fine, a faully hash board does not really cause the kernel log to report power loss.

You can confirm this by swapping another hash board (the one you think is faulty) with one of the two running now.

Really? 24 degrees where I live is more like winter, people here will say "it's a hot day" when temps are above 35, we use capital HOT when temps go above 40c, so 24-31 is just about below average taking all 4 seasons temps combined, I run my miners with temps over 45c sometimes, usually no problems when the airflow is good, I think Bitmian has 40c at the max temp in the datasheet, but my personal experience 45c is okay if you have a decent airflow.

With that said, when temps gove above 40c I usually have awesomeminer take care of them by reducing the hashrate a little just to be extra careful not to burn things down.

You can use a VPN, just get a decent router that supports VPN and use a paid VPN service, using VPN "may" and is likely to increase the latency of your mining operation, but if your connection to the VPN itself is good and you use a mining pool that has a server close to VPN location you connect to - the latency added will be very low and your earnings will not be affected by any considerable levels.

With that being said, should your country ban BTC mining you should NOT be mining bitcoin, the government always has other means to spot your mining operations even if you hide it from your ISP.

You mean "assembling" a custom miner I suppose.


Mining isn't solving math problems, people who use that term to explain how mining works either have no clue or are just trying to come out with the simplest explanation for the average joe to digest which is fine for those who don't care much about how mining actually works, but the reality is mining is all about guessing a random number, the faster you can make and submit your guess the higher chances of winning a block.

So if you want to mine using a piece of paper and then type that hash on your PC and broadcast it to the network, nobody will stop you, a hash is a hash and it will always have a chance of hitting a block, but then I am afraid by that by the time you put the pen down and start typing it on your keyboard, someone else will hit a block and then the hash of the previous block changes which will make your paper hash completely useless with 0% chances to hit a block.

Then you have a faulty chip which is most likely in the first domain like chip 0 or so, although the 0 chip error could be the result of something that is power related (not something you can see with your naked eye), if you have time and the tools you can check the voltage across all chips to find out which one is toasted, but then you will need to order the chip to replace it, not sure if it's worth the trouble given that fact that this is an old S9 which is approaching it's final stages anyways.

He probably got to the conclusion based on this part of the kernel log


The term "real AsicNum" isn't very clear, but it simply means the "normal asic number" which the control board is expecting to sense from each of the hash boards connected to it, so if it doesn't find all of them then -- troubles.

OP, is this miner running only with one hash board? have you tried a different firmware? some background/ history about the miner will help us troubleshoot more accuratly.

The high failure rate isn't something confirmed by any scale, these gears are just a rebrand of other miners (mostly INNO), so their failure rate is within the range of the original piece of gear, but that's great advice nonetheless, those gears shouldn't be bought.

OP, it seems like you have free power and you are looking for the cheapest gear possible, I know this is outside of the scope of your question but do you know what it takes to run a single unit that consumes 6000w? do you have any background about electricity, wiring, MCBs, fuses, amps, volt, and all that?

The reason why I ask is that where I live power is either free or almost free, so most newcomers take your route, I was contacted by so many folks who bought BITFURY gears and most of them had troubles with electricity, this beast sucks a ton of power, despite the fact that it takes 2*C19 power cords to run it - the infrastructure needed to run such gears isn't available at home, so most people end up selling it for a lot cheaper to those who have the infrastructure needed.

With that being said, according to one person who I trust and know he has been mining for years, he said those gears are very robust, but the power consumption is out of the question even if you had free power, it will be limited/capped by something outside of your control and thus you won't be able to expand, so I'll add my vote to NFW and say go with Avalon.

Ok let's do some simple math for the worst-case scenario possible, let's reset the counter to the max possible hashrate we had, which was 17.89EH, so we work with 180EH for the sake of simplicity, let's say all of it comes back online by end of the year, I think this is a "fairly pessimistic" estimation which we all agree to.

Now this


This is more of a half-full glass vs half-empty story, you can say that if just two companies 170k S19 pros then the total will be a lot more, you can also say that since Bitmain has delayed the delivery for these orders for almost a year to be sent in full, then they must be having some trouble making new gears, then to answer this question.


Probably not so many. When was the last time Bitmain sold any mining gear on their website? not for as long as I can remember, of course ignoring the limited sale of S19js that went out of stock in no time which was most likely due to them listing a very small amount of gears, so if you ask me, these two guys are probably their biggest clients, I highly doubt that Bitmain has pending orders of more than 300k miners in total, these two folks probably make half of the demand, so if bitmain makes 300k miners in a year, or let's just say they will make 500k gears (accounting for the other manufacturers) then by the end of 2022 we will at most have an addition of 50EH on top of that 180EH.

That would translate to difficulty of 32T by Q1 2023. but then.

We can't ignore that Bitcoin price can take a huge dive and suppress the demand on gears, many miners will be forced to shut down, the 60EH that are still offline and yet to find a new home are not likely to show up by end of the year, no place on planet earth has both China power rates + power capacity + cheap mining gears + infrastructure and whatnot, all of these factors will slow down the difficulty increase, but even in the worst-case scenario where everyone has cheap power and ready to host as many miners they can afford, with bitcoin price going only up and the world is the perfect place, the hashrate will still be capped production.

In short, miners like us who are already well placed in the game will be pretty happy this year, and probably 2022, folks who paid 6k or 8k for a miner they are going to receive next year will probably be in deep shit.

Pool rewards are the same across all pools that pay in the method, PPS+ for the case of Binance, I think the most important factor after the one you listed above was the fact that they offered 0% fees mining for 3 whole months, nobody can do that shit to be honest. PPS fees have to be high (the explanation is a bit too long but that's how it is), so when Binance offered 0% fees when pools like Viabtc was 4%, a ton of miners moved there, and after the 3-month free period, Binance didn't come back with a 3% or 4%, they came back with 2% which is the lowest PPS+ fee you can find in the market, at that time I think only f2pool was offering a similar fee, so Binance managed to keep most of the miners who came for the 0% fees.

On a side but related note, being a bit too picky, I did not like Binance pool at all, I might not have given it a fair test and it must have improved since I tested it in its early days, but it was far from stable, however, seeing miners still use it, they have probably improved a lot compared to when they started, I still don't use their pool service since I use their exchange, it's a bit too risky to be all in one place, which is funny because most miners who use Binance will tell you they do so because they can withdraw to the exchange for free.

Maybe he is a bit optimistic, most certainly not "too optimistic", let's just assume this whole china thing and the drop to 30k did not happen, at 60k bitcoin it's save to assume that the vast majority of mining gears were profitable, the highest hashrate we ever had was what? 170EH or so? now back to reality what do we know?

1- Production of mining gears is too slow.
2-Relocating all that hashrate takes a long time.

What's more important than all of this is the fact that 10% addition on top of 110EH is far easier than a 10% on 170E, so even after all the old gears come back online, we will be capped by 170E+ whatever China has produced since May, 1EH is 10k S19s, do you think Bitmain will make 1M S19s by Jan 2032? I don't.

So my point is that (I think) phill is being optimistic, but you are being a bit pessimistic (which isn't bad at all for any miner to be)  , I believe what's going to happen is something in between the projection of you both, I believe we will surpass the 24t sooner than Jan 2023, but not any time soon.

There is no bring up sensor, the miner tries to warm the hash board to normal operation temp, it uses the 4 sensors to obtain the current temp.


What is the room temperature? these miners can't function well if the room is too cold.

When diff is at 17.5T every TH will be making about 0.32$ a day  (assuming btc price is static) , so for someone in EU who pays 15 cents and is running say an S9 at  93w/th they will be forced to shut down, this is why I said "it is DIFFERENT for everyone" because everyone's profit margin is different, some people are affected by 10% increase in price or 15% drop in price, others are still in the safe zone even with 100% increase in difficulty.


Does not seem like a bad plan at all, but, you are making a big mistake thinking your gear can mine for 1 year which isn't certain, also, the second point is that I see you use fiat values to determine ROI, to me, that's a bad business model, you need to consider ROI in BTC, if you can't mine the same amount of BTC you can buy today + a good enough amount, then buying bitcoin now and not having to deal with all the mining process is a no brainer.

With that being said, 6 cents is pretty decent, your main issue will be the lifespan of your mining gears, if they can survive long enough, you will probably be in the green, also make sure you get a spare PSU, they are rare and expensive and have a bit of a high failure on all the 19 series, so buying 1-2 or two whenever they are available will be beneficial.

It's different for every person depending on their power rate and the efficiency of their mining gears, if the price stays the same and the next difficulty epoch is 10% higher, that will be the point for so many folks running 70w/TH or higher and pay above 8 cents, IMO miners should be prepared for a never-ending difficulty increase which isn't going to be offset by price for the long run, but as it stands right now, mining is very profitable for those who bought gears at reasonable prices.

It's not that exhaust fans that are sucking air in, the air has to come in from somewhere when the pressure isn't balanced.



You still have to fix the air pressure regardless, this way you are hurting the miner's fans and the exhaust fans, it's a bit hard to follow your set-up without seeing an actual image or at least a sketch, but I gave it my best, can you reduce your intake to 6000 CFM without reducing the exhaust and do the "paper test" again?

I wouldn't count on that drop, we are still too early but my guess would be on the upside, maybe not another 7% but most likely up, it's hard to estimate difficulty while prices keep changing this much, but as it stands right now and regardless of what the price might do, from now on, we are most likely only going to go up. sadly.

While 88c is within the normal range specified by the manufacturer, you should take this info and toss it out because the manufacturer doesn't tell you that these T17 gears use a very low-quality solder which will break a lot sooner than you think, and thus, you want to try to run them as cool as possible to "hopefully" get them to hash longer.