Couldn't really find an exact figure, however this article >https://www.globaltimes.cn/page/202110/1235752.shtml reads;


So it seems like the shortage is serious and the demand is pretty serious, also according to Reuters Coal imports in China increased by 76% this year compared to the last year, also given the fact that the rainy season in China is over -- it impacts power supply by a good margin.

I have nowhere near the experience you do when it comes to electricity and all that, but I think that this will work just fine, I "unintentionally" had a few miners hooked up this way and nothing went wrong, in fact, the moment the PSU loses one of the two inputs it will instantly shutdown, it will only keep the PSU fan spinning if the other input is plugged in.

I believe as long as the input voltage is the same (which should be in OP's case) it should work just fine.

I think the APW9 PSU is just two independent PSUs combined, however, since this is your field, check it out https://www.zeusbtc.com/manuals/repair-guide/Antminer-APW9-power-supply-repair-guide.pdf, you might be able to confirm if there is an actual risk supplying it from two different circuits.

So +0.9522%, I can't complain.



That, plus

https://www.reuters.com/world/china/chinas-power-woes-may-worsen-demand-surges-amid-coal-supply-lag-2021-10-18/

Chinese manufacturers have been asked to reduce their power consumption, almost everything has slowed down in China, People are working fewer hours now than they did back then, Coal prices went up from like $55 a year ago to nearly 250$ a few days ago, it now sits at a massive $237,  I believe this affects every country in the world since Gas and Oil prices have also been climbing, this is all nothing but good news as far as the difficulty is concerned.

Speaking of prices, what is everybody's plan if the power company decides to increase power prices? where I live, that isn't doable by any stretch of the imagination, which is a relief.

Ok, your theory now is more solid than before after you have explained it a bit further, one missing point which I'd like to know. Are you suggesting:

1- They run the most profitable gear at any given time regardless of everything else.

or

2- They try to suppress the difficulty regardless of point no.1?

I think the type of mining gears running at the farm will determine whether this becomes feasible or not, if the farm is full of 17 series gears, well, then probably a dozen technicians can do that full-time, if it's other robust gears, the amount of work needed could be extremely low.


Makes sense.


If the chips are burnt then they are burnt, the kernel log won't show 30 asics at times and 0 in the others, however, if it's just a bad solder connection then it's pretty normal for the hash board to show 30 asics and then maybe 24 and then 0, I personally managed to fix a few hash boards by freezing them in the freezer, the freezing did something to that solder joint and fixed it, so ya, it's pretty normal for that to happen.

تخضع منصة باينانس للعديد من التحقيقات من ضمنها هوا هده التسريبات او استغلال اخبار "ادراج" العملات للكسب الشخصي, الشبهات تدور حول ان باينانس تقوم بشراء العملة من المنصات الاخرى سواء المركزية او اللامركزية قبل الاعلان عن اضافتها بوقت كافي, ومن تم تقوم بالاعلان عن الاضافة فيهلع الناس لشرائها قبل حتى الادراج, هنا المنصة تكون كسبت الملاين من المنصات الاخرى قبل حتى ادراج العملة في سجلها, طبعا ممكن ايضا ان المنصة نفسها تقوم بالبيع لمستخدميها فورا عند الادراج بعد التلاعب في السعر وهوا مايبدو واضح في اول دقائق الادراج.

كل هده التحقيقات لازالت قائمة ولكن ان كنت سأخمم احتمالية وجودها فأنا على يقين ان مصنة بايناناس تستعمل مثل هده الاساليب لجني المال من المبدئين بدون اذنى شك.

Welcome back man, you went missing for quite a while, by the way, if you are interested, I could add your name here > https://bitcointalk.org/index.php?topic=5297994.0, you are the most experienced member in fixing these hash boards, trusted and can probably do better than most of those overpriced services listed, check it out and let me know.

---

It's more like a bad chip connection than just a loose heatsink, in fact, if the heatsink isn't shorting anything, the miner will still run for a very short while before showing "Over-Temp", but getting the temp sensors errors is probably because of a dead/burnt chip or a bad connection between one of the chip and PCB.

This problem could also be caused by a bad PSU, do you have another PSU to test with?

If bitmain has that many gears sitting on the sideline they could just sell it, to be able to have any considerable impact on difficulty, we are talking EHs worth of power, which means thousands of mining gears, the question remains, why wouldn't they just sell those miners instead of having them sit on the shelf for some period of time? after all, these gears are so expensive and they hardly ROI in a year running 24/7, having to shut them down every now and then only extends the ROI period.

The second problem is, does Bitmain really have any mining gears online? unless they have mining farms outside of China the once in China probably went offline, Bitmain won't risk mining in the dark, I know they have partnered with Enegix in Kazakhstan in a 100+ MW facility, but being just a partner, I don't think they will operate in this style, I could be wrong tho, nobody really knows.

Also, as everyone knows, Bitcoin has been outperforming all other minable coins the past 2 weeks, if anything, miners would want to be mining Bitmain not the other coins since the profitability of the other coins hasn't gone up as Bitcoin did recently.

That's an interesting theory, however, I don't think the math checks out for anyone to do so, I could see miners putting a timestamp into the future to try and "exploit" the difficulty, but given the "MAX_FUTURE_BLOCK_TIME" rule -- they are limited to a maximum of 2 hours/2weeks which is roughly 0.6% assuming all miners are doing the same thing.

But shutting down profitable miners just for the sake of trying to keep the difficulty low isn't something I see them do, after all, Bitmain can sell the bitcoin they mine today for 62k, nobody knows if they can sell it for the same price in the next epoch.

Was there any other hash boards attached during the test? Did you try a different ribbon cable?

If it was only one board and you tried different ribbon cables then it could be a PSU issue, try using a different PSU.

You should also try to flash a different firmware, try the multi-option firmware by bitmain.

Its likely poolin, i think I remember they had over 22EH a week ago or so, thier 3 days average shows 6EH and 24h averages shows 4EH.

Its unlikely that those many miners left the pool in 3 days, maybe they are using a new node and blocktemplate that does not show thier name for whatever reason given the Chinese drama?

Zeusbtc is as legit as any mining-related company can be, but all the repair centers outside of China are not owned by them, in fact, they don't even know if those repair centers are actually legit, if you can provide enough evidence that you can repair hash boards they will add you to the list, so while all those repair centers have gone thought at least a minor check before making it to the list -- there is no guarantee that they are legit or can actually fix your dashboard.

With that said, if you have no other option, you might as well just take the risk.

The best way to troubleshoot this would be to leave the bad board plugged in a different slot using a different ribbon/data cable while unplugging the other two, if the problem persists then you have a bad hash board which is likely the case, if it isn't, then we can troubleshoot further, however, given the kernel logs you posted I can't help but think it's just a bad hash board.

I believe this is only true if you mine on Slushpool.


Really? how? do you mean you can split the hashrate between two different mining pools?


You are right, this isn't a moded firmware, BO was coded from scratch, the BO+ version is just an improved version of it.

I am surprised you have taken such a risk knowing the circumstances, I really hope you get all yours in time.

Meanwhile, we went up a bit from -3% to -0.09%, of course, we don't what is causing this, but it's still looking good nonetheless.




the folks that I know did not receive anything yet.


 

Try to contact the seller you bought it from, if I remember correctly, I saw one guy on Aliepxress mention sharing the SD files via email for those that buy the tool, many folks have the files, I am surprised why isn't public and easily accessible yet.

They probably are doing that, but then miners could shut down at night, also, maybe there are some factories that operate 24/7 which miners can use to hide their mining operations.


4502 IP addresses could be 4502 mining farms with a dozen miners in each, not sure how they got to this



it is.


LOL, my hope has been for small difficulty spikes of below 5%, honestly with prices where they are you wouldn't expect the difficulty to drop unless some serious hashrate is leaving, and that is most likely coming from China.

It looks like it, read this link https://jsca.miit.gov.cn/xwdt/gzdt/art/2021/art_97125dc430264d4c82f42713a2eea23b.html

It seems like the Chinese government is getting more serious about banning bitcoin mining, they are tracking internet traffic to try and spot where large operations are happening.

This will likely scare some illegal miners off, the harder the government tries to find them the less risk they will take, but will that be offset by migrated and new gears? Time will tell.

Try to replace the PSU fans, if that does not fix it, then well, you got a dead PSU.



Check with @gracezhou1993 on telegram, she usually has them in stock, however, the price will likely be in the 200-300$ range which is of course more expensive than buying directly from Bitmain, also as of this week, Chinese vendors started to charge 5% on all crypto payments, the prices they list is usually in USD (bank transfer, WU, and whatnot).

It won't last.


That's quite a drop, but probably a combination of luck and miners going offline, I am in their telegram group which is pretty active, I checked and nobody seems to have any issue with the pool itself.


He is cherry-picking stuff to support his claim, he mentioned Bitfury mining farms which are probably closed by now, and he ignored companies like (Marathon Digital,Core Scientific, Blockfi, DMG, Riot, and many more mining farms that are located in the U.S, these companies alone probably have 25EH and it's growing, the public data for these companies bulk orders from Bitmain and the other major mining manufactures show roughly 50EH ( probably half runs now based on a rough estmiate).

So if anything, Cambridge's study was unfair to the mining share of the U.S since most of those large guys have their own mining pools.



The last study put China first and the U.S second, 1/3 is more than enough sample size, with the Ban in China we say 40-50% drop in the total hashrat, which suggests that the majority of the hashrate in China went offline (unless someone thinks that banning bitcoin mining in China will cause miners in the U.S to shutdown), so without a doubt right now the U.S is the largest mining hub.