Also for the cables that supply power the the miner. C13 x NEMA 6-20P cables will suffice?
Having a hard time finding any information regarding this online Mainly just need to make sure they are at least 16ga or preferably 14ga wire. check stayonline.com for cables, good prices and made in USA, UL/CSA rated. |
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Power transformers are not rated in amps - they are rated in kva (loosely translates to kw) and the rating will be marked on the side of it. If too far away, use a pair of binoculars to to see the rating. Also remember that the transformer is feeding all your close neighbors so you do not get to use all of what can produce...
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So just use sidehacks hubs... Port power is set up with each set of 2 ports fed from 6A which allow a full 3a per set of ports or if you do not mind the chance of frying a connector, 6a from 1 port in each set. FYI, USB-A connectors are rated for 3.1A max
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 No. And if you have any doubts about the pool and who is running it - move to different pool... Any particular reason you have not named the suspect pool? edit: is it solomining.io? |
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The only glitch I see is that your outlet is a twist-locking one but your cord is not. They need to match so using the cord you give that means the receptacle needs to be a NEMA L6-30R with straight blades. edit: Also the Romex 14/2 is drastically undersize -- using 25a or 30a breakers means you need 10ga wire. For reference: https://www.cerrowire.com/products/resources/tables-calculators/ampacity-charts/ |
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I get the new firmware "A1246-A3201-Plus-P3600W-New-Temp65_21071301" from canaan. Same temp problem, and with it, it can't go up to 73 TH in turbo mode here are the temp from log  1st, it's nice that Canaan is still using temp sensors in each chip  Seeing that table tells me that either those specific chips have faulty sensors or the chips/cores themselves have issues. Either way, assuming the miner is happy running in normal mode that's how I'd run it and not bother with repair because of the time involved. Query: In normal mode I take it those chips are still reading higher temps than the others but are not in the danger zone? That said, I'd 1st see what Canaan has to say about it. With the Avalons at least the end user can actually replace bad hash boards themselves if they are comfortable doing it. |
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Now since 17 series need two outlets, so each PS(cord) should have same amps for breakers? Well... A problem is that the 17's need both inlets to have power that is switched at the same time. Using 2 breakers (1 for each cord) means that it is possible for 1 to trip while leaving the 2nd one live - the PSU will not be happy about that... So... your best setup would be 1 breaker feeding the 2 cords. Just be sure to use at least 16ga cords, preferably 14ga so there is a decent chance of them surviving an overload bad enough to trip the 25A breaker. As for power: W=V*A or inverted you get A=W/V so assuming you are pulling the same power using higher voltage pulls less amps, lower voltage pulls more amps. Regardless of what your line voltage is, the miner will pull the same amount of power since that is determined by what the PSU is putting out -line voltage does not affect that, it just changes how hard the PSU has to work at putting out its commanded voltage. |
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Only 1 way to find out -- try it.
Again, the USB meters only show what is feeding the stick and how much current it is pulling. No matter what the voltage should always be close to 5vdc and under heavy load at most drop to maybe 4.5V. Current will all depend on what speed you are running at. If you tweak Vcore a little higher using the very tiny pot, expect the current to go up.
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Reviews from 'sites' are generally crap and are easily bought. Just look through the Hardware and the Support areas here to see what real users have to say about them and the problems they have.
I do not and never will mine crapcoins, I only mine BTC. This is the Bitcoin-only area for a reason -- it drastically cuts down on the noise hyping the latest shitcoins most of which are worthless.
As for the speed of the 841's and other older miners -- in the long view of things, the speed of any individual piece of hardware does not matter that much. All blocks are found by just 1 miner and many if not most in the world that are running are NOT the latest & greatest. Case in point, I have a "lucky" R4 from early 2017 that runs 8-9THs and yet it has hit 3 blocks in its lifetime, the last one was in 2019 when it returned a share with a diff >150T. Yes higher total speed gives you more rolls of the dice so-to-speak so if you have slower miners, just get more miners.
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Answers:
1. Depends on the make, model and your luck. Could be years, could be months. Case in point the S17 series were showing up to 25% failure within months but - some of them are still working after 2 years. I have a miner from 2017 and many A841's that have been running non-stop since 2017.
2. Taproot has nothing to do with the miners - it is change in Bitcoin Core and the miner hardware has nothing to do with it.
3. Unknown. Diff changes constantly both up and down so predictions like that are pretty useless.
4. I doubt it. For several reasons I'm sure hardware will be changing very little in that time.
5. Correct - provided you have low cost electric and a place for the miners that can get proper airflow and is not somewhere where their insane noise would be a problem.
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Ja. look for pins that are either silver plated (good for higher current, up to 5A per-pin and are 'slippery' usually good for the 25-cycles rating) or gold-flashed (almost as good but rated for fewer plug/unplug cycles) and 16ga copper wires.
Also a good reminder for folks out there: If you are using 2 PSU's to give the required power (the 851 is something like 1.8kw) each PSU can only feed 1 side of the miner! All the PCIe sockets on each side are tied together and if different PSU's are plugged into the same side they will literally fight each other to be the one doing the voltage regulation/supplying the most power and the result is not pretty...
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For paying attention (and having intelligent posts) gave ya yer 1st Merit. |
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@VanLife4Me, please edit your posts to use the code tag. Found on the tool bar it looks like #. Using it changes text logs to a much easier to look at scrollable box like this cgminer version 4.12.0 - Started: [2021-10-28 17:59:42.804]
--------------------------------------------------------------------------------
(5s):870.0G (1m):841.4G (5m):813.9G (15m):805.1G (avg):799.4Gh/s
A:1061242 R:0 HW:544 WU:11166.9/m
Connected to stratum.kano.is diff 442 with stratum as user xxxxxxxx.worker
Block: bf5e4b2d... Diff:20.1T Started: [19:29:35.353] Best share: 892K
--------------------------------------------------------------------------------
SB management [P]ool management ettings [D]isplay options [Q]uit
0: GSF 10050209: BM1397:01+ 400.00MHz T:400 P:400 (31:16) | 100% WU:100% | 196
1: GSF 10050081: BM1397:01+ 400.00MHz T:400 P:400 (31:16) | 100% WU:100% | 293
2: GSF 10050191: BM1397:01+ 400.00MHz T:400 P:400 (32:16) | 100% WU:100% | 347
.1G / 268.0Gh/s WU:3744.1/m-----------------------------------------------------
[2021-10-28 19:33:17.202] Accepted 375b762b Diff 1.18K/442 GSF 2
[2021-10-28 19:33:18.604] Accepted 1a901997 Diff 2.47K/442 GSF 0
[2021-10-28 19:33:19.002] Accepted 481c8428 Diff 909/442 GSF 2
[2021-10-28 19:33:20.763] Accepted 0d5c652a Diff 4.91K/442 GSF 0
[2021-10-28 19:33:21.861] Accepted 52c80865 Diff 792/442 GSF 1
[2021-10-28 19:33:22.101] Accepted 834b1bce Diff 499/442 GSF 1
[2021-10-28 19:33:24.344] Accepted 5cfdf732 Diff 705/442 GSF 2
[2021-10-28 19:33:25.284] Accepted 091f85f6 Diff 7.18K/442 GSF 2
[2021-10-28 19:33:29.083] Accepted 45308790 Diff 947/442 GSF 2
[2021-10-28 19:33:29.423] Accepted 25566981 Diff 1.75K/442 GSF 2
[2021-10-28 19:33:30.581] Accepted 0400f618 Diff 16.4K/442 GSF 1
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Primary side of most transformers is delta and is connected directly to the incoming power so that is fine. It is the secondary side that we care about and prefer to be wye.
You will have 3 hot legs and chassis ground feeding the xmfr, a neutral is not used on the primary. The secondary wye side is where the neutral is created.
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The incredible noise that miners make is something that many/most home miners just do not realize and overlook: it is on par with an old industrial shop-vac or a leaf blower - but louder. A simple test: find your loudest home appliance -- preferably one that is almost painful to hear -- fire it up in the garage and see how loud it is near your neighbors. Odds are you are going to need to put in sound insulation...
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Thats probably why it hasnt been mentioned. Its not as linear as the previous sticks. Cheers Kano.
EDIT:-
Just throwing this out there. But would there be a market for a dual to single usb pcb to join two ports together on the gekko hub? So you can run a compac-f at full speed? Er? Why? to feed the F 6A? You can already do that with his hub -- if you do not mind vastly overloading the USB socket, just leave the other port open, plug in the F and crank her up. A dual to single adapter still faces that max 3A limit for the single socket. |
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If you take a look at the Mining Support and the Hardware areas here you will see that the S17's are a piece of shit. Many folks have over 25% failure rates on them and over clocking them -- hell, over clocking ANY miner -- will just make them die faster. Wrong area to ask about altcoin gear -- use the altcoin area of the Forum for that. |
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...
Problem of running turbo while syncing is not CPU bottleneck, its thermals. The CPU could overheat and shutdown if its running at 100% while syncing, and the hashboard is in turbo mode. That's a serious problem with the device then. You are saying we can't run desktop computer in the device at 100% while Turbo mode is on in the miner part. What if YouTube is on for a few minutes and CPU spikes to 100%, or any other more CPU intensive task is running, not just bitcoin node but anything else, it means sudden shutdown? ... Um, these are miners and a dedicated BTC node -- not a desktop computer! The computer part is designed to be just an embedded controller and as a BTC node which normally are rather light CPU usage operations but more to the point they are also to a good extent time-sensitive. It is not intended for streaming video, gaming, or anything else which can/will as you noted steal critical CPU cycles from the main operations... The miner & node work as intended and are not flawed in respect to what they are designed to do.. |
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I love how in that link they say, The 1 MW limit is far below what many existing industrialized mines operate on, but is more than many small cities consume. More than 'small cities consume'?  Maybe more than a small rural farming village where the homes just have a small refrigerator, a couple fans and a few light bulbs for when it gets dark.. Hell throw in some large stores and you are already over 1MW. Saying that 1MW is enough to feed anything that can be called a 'city' is laughable. re: the cutting miners to sell elsewhere, depends on if the needed transmission lines are in place to do it. The hosting centers/mines that were in the Portland OR and Washington state areas were not shut down from supply issues -- the Public Utilities did not want to keep paying for upgrading existing lines to feed the rapidly growing energy usage-dense data centers -- specifically ones for mining. Thing is, the area was originally home to a couple ALCOA aluminum smelters because of the massive hydro power dams there. When ALCOA shut the smelters down the miners moved in along with several massive Google and Microsoft data centers. Then - some new main grid transmission lines were completed to connect the dams to neighboring areas/states & Canada meaning power could be sold to them with a hefty markup in price vs the local market. Well per cu/ft of rack space mining farms/hosting sites are far more hungry to feed than conventional data centers. Throw in a media circus about energy usage and.. bye bye miners  |
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Why is it that people avoid these high-leg delta option? You mentioned that this is a compromise, but i'm trying to understand what exactly is the problem with this options. Is it harder to load balance? is it harder to find breaker panels or is it something else.... That Wikipedia link explains it all. The 'problem' comes when the 120V single-phase portions are used for lighting and other 120v things- you need to make sure that every 3rd opening in the breaker panel is NOT used as it is the high-leg and will be around 134v vs 120v when referenced to the neutral. Beyond that the addition of 120v loads unbalances the 3-phase loads because the wild leg only supplies the 3rd phase. Considering you will be mainly running 240v loads using 2-pole breakers everything automatically balances out. Just make sure you never plug a 1-pole breaker into the wild leg slots as it will not be 120v. |
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