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Showing 20 of 427 results by Nexus9090
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Topic
Board Mining support
Re: [Bounty] GekkoScience Compac F miner stops hashing
by
Nexus9090
on 25/07/2025, 17:52:30 UTC
Buy a fan for it. They don't run well just with passive cooling.

Until you have a fan on it, limit the clock rate to 400Mhz ~=200GH/s.

Once you have a good cooling fan for it you can probably clock it up to about 545Mhz. don't be tempted to over-clock it unless you're going to bolt on a much bigger heatsink with good thermal compound.

Also, you might want to change the repo you got CGMiner from to the officially supported source, downloads from elsewhere might contain undesireable features.

Kano's github is the only officially supported source:-

https://github.com/kanoi/cgminer/


Also, this table is quite useful for power consumption and hash rates Vs clock rate

Post
Topic
Board Pools
Re: List of solo pools
by
Nexus9090
on 22/07/2025, 08:28:33 UTC
You have https://pool.nerdminer.de listed twice in your OP
Post
Topic
Board Pools
Re: List of solo pools
by
Nexus9090
on 20/07/2025, 09:04:44 UTC
vkbit solo is good?

I didn't think it was still running. Last time I looked it wasn't, but that was 6+ months ago.
Post
Topic
Board Pools
Re: [∞ YH] solo.ckpool.org 2% fee solo mining 302 blocks solved!
by
Nexus9090
on 19/07/2025, 14:38:04 UTC
WOW!

Avalon nano 3 best share



Sadly nothing for second place. Nice shot though, be another 4000 years before that arrives again.  Wink
Post
Topic
Board Pools
Re: [ANN] FindMyBlock.xyz – Solo Mining Pool by Bitcoin Enthusiasts, Feedback Welcom
by
Nexus9090
on 17/07/2025, 10:26:51 UTC
Good luck.,

But there are many solo mining pools with a proven track record. I doubt you'll get much support to be honest.

I certainly wouldn't touch it with a barge pole until you've got a proven track record.


Just out of interest who's pool code are you running or is this something of your own making?

Post
Topic
Board Pools
Merits 2 from 2 users
Re: [ANN] FindMyBlock.xyz – Solo Mining Pool by Bitcoin Enthusiasts, Feedback Welcom
by
Nexus9090
on 16/07/2025, 18:01:21 UTC
⭐ Merited by NotFuzzyWarm (1) ,philipma1957 (1)
Are you another one of these pool operators that just pretends to run a pool but instead forwards shares to another PPLNS service so you get everyone else to pay for your hashrate without ever having a chance of winning a block?

Always sceptical of "noobie" pool operators, your account here is new, you've no history of interaction with anyone that's been posting here for years.

Why would anyone trust you with their hard earned hashrate when you've litterally no credibility?

Post
Topic
Board Pools
Re: [BLOCK] solo.ckpool.org 2% fee solo mining 302 blocks solved!
by
Nexus9090
on 11/07/2025, 08:34:50 UTC
Congratulations to miner 35ny~zePa with an enormous 200PH for solving the 302nd solo block solved at https://solo.ckpool.org!

Code:
[2025-07-10 23:23:41.607] Possible block solve diff 203701245552727.218750 !
[2025-07-10 23:23:41.678] BLOCK ACCEPTED!
[2025-07-10 23:23:41.679] Solved and confirmed block 904989 by 35nyBqH57y7i7diofDiAGRsBDPrSEuzePa.v53
[2025-07-10 23:23:41.679] User 35nyBqH57y7i7diofDiAGRsBDPrSEuzePa:{"hashrate1m": "216P", "hashrate5m": "204P", "hashrate1hr": "194P", "hashrate1d": "193P", "hashrate7d": "51.3P", "shares": 66966378667288, "authorised": 1736387280}
[2025-07-10 23:23:41.679] Worker 35nyBqH57y7i7diofDiAGRsBDPrSEuzePa.v53:{"hashrate1m": "50.5P", "hashrate5m": "46.8P", "hashrate1hr": "47.4P", "hashrate1d": "29.1P", "hashrate7d": "5.97P"}
[2025-07-10 23:23:41.690] Block solved after 111436041228796 shares at 95.3% diff
https://mempool.space/block/0000000000000000000161bc7461e9736bcda0f28458bd75265019864961aefb

A miner of this size would solve a block once every ~35 days on average at current mining difficulty.



Another luck block! congrats to the miner and -ck

Mine on!  Smiley
Post
Topic
Board Pools
Re: [∞ YH] solo.ckpool.org 2% fee solo mining 301 blocks solved!
by
Nexus9090
on 10/07/2025, 12:04:57 UTC
https://d.top4top.io/m_347838xbz0.mp4
This rate 80000H /sec
This python3 wasting time?

Read this thread.

https://bitcointalk.org/index.php?topic=2415854.0


These days, anything less than 1TH/s is wasting your time and even at that entry level rate the odds are astronomical

Chance per block: 1 in 920,100,000

Chance per day: 1 in 6,389,583

Time estimate: 17,506 years
Post
Topic
Board Pools
Re: [∞ YH] solo.ckpool.org 2% fee solo mining 301 blocks solved!
by
Nexus9090
on 10/07/2025, 08:52:44 UTC
I was thinking of a service to mine on ck pool.

I have a 100th modded t21

It would cost me .23 x 50 = 11.50 usd to run it for 24 hours

I would do it for $12.50 a day in doge ot ltc or btc.

Anyone interested let me know

.

You might want to consider listing your spare hashrate on MiningRigRentals (https://www.miningrigrentals.com/) I'm not sure what they pay out probably worth a look.

Post
Topic
Board Pools
Re: [∞ YH] solo.ckpool.org 2% fee solo mining 301 blocks solved!
by
Nexus9090
on 09/07/2025, 18:00:03 UTC
Can i find hash below target with rate 43.000.000.000 in 3 days?

I assume you mean 43TH/s hash rate.

With the current network difficulty, the odds of you finding a block at 43TH/s are

Chance per block: 1 in 22,010,930

Chance per day: 1 in 152,854

Time estimate: 419 years

Post
Topic
Board Pools
Re: HELP: Setting up solo mining pool on my own BTC node
by
Nexus9090
on 09/07/2025, 08:35:27 UTC
I finally got public pool configured on my Pi 5 too. You can customise the Pironman case and set the fan speed etc, not very noisy at all.

What I have found though is that public pool gives me more rejected shares than ckpool...

I'm quite pleased with the Pironman Max case its well thought out and pretty easy to build.

I've pointed 3 workers (approx 7TH/s) at my CKPOOL set-up, other than 2 shares being rejected at start-up its been running flawlessly.

In fact my BitAxe Gamma hit its all time best share yesterday morning which was a pleasant surprise.

I'm working on getting a local stats web page up and running on it too, but thats going to take some time as real world issues have to come first.

In terms of usage stats, its been consistenly running with <2% CPU usage and around 1.7GBytes memory usage.

So, quite capable.
Post
Topic
Board Pools
Re: HELP: Setting up solo mining pool on my own BTC node
by
Nexus9090
on 05/07/2025, 15:53:46 UTC
Just following up on this.

I bought myself a PIRONMAN-5 MAX case and repurposed one of my PI-5's and a 2TB NVME SSD. The PI-5 I've used is only a 4GByte version.

Setting up Bitcoincore 29 took me around 10-15 minutes, sync of the blockchain took nearly 3 days.

As a side note, I compressed the data directory for offline storage to a TAR.BZ2 at max compression even after all that it is around 693.5GBytes in size, but at least in future I can use that to rebuild the chain without having to re-download the whole damn thing again. Mind you, the copy from the PI to the backup storage media took nearly 3 hours alone!

I then git cloned CKPOOL and followed the build instructions, this worked fine.

Then I spent around an hour tinkering with the ckpool.config file to get it functional with my set-up. This was the hardest part of it.

Once that was done, I connected one of my mining rigs and away it went quite happily mining to the PI5 through Stratum to the newly configured CKPOOL on the PI5


In terms of usage stats: memory usage is hovering around 1.2-1.7GBytes

CPU usage is <2% on average.

So the PI is more than capable of running both Bitcoincore and CKPOOL as a local pool provider.

I'll follow up on this post with a more detailed configuration and step by step but for now it seems to be working just fine.


Post
Topic
Board Pools
Re: [BLOCK] solo.ckpool.org 2% fee solo mining 301 blocks solved!
by
Nexus9090
on 04/07/2025, 08:31:21 UTC
Congratulations to miner bc1qyj7x3d64znz2jdn28k0fxl8pq4q39a3ke79sj3 with 2.3PH for solving block number 301 on the EU http://solo.ckpool.org!

Code:
[2025-07-03 21:37:17.080] Possible block solve diff 941072047180675.375000 !
[2025-07-03 21:37:17.146] BLOCK ACCEPTED!
[2025-07-03 21:37:17.174] Solved and confirmed block 903883 by bc1qyj7x3d64znz2jdn28k0fxl8pq4q39a3ke79sj3
[2025-07-03 21:37:17.174] User bc1qyj7x3d64znz2jdn28k0fxl8pq4q39a3ke79sj3:{"hashrate1m": "2.28P", "hashrate5m": "2.29P", "hashrate1hr": "2.3P", "hashrate1d": "2.17P", "hashrate7d": "2.22P", "shares": 6944274227820, "authorised": 1738446333}
[2025-07-03 21:37:17.174] Worker bc1qyj7x3d64znz2jdn28k0fxl8pq4q39a3ke79sj3:{"hashrate1m": "2.28P", "hashrate5m": "2.29P", "hashrate1hr": "2.3P", "hashrate1d": "2.17P", "hashrate7d": "2.22P"}
[2025-07-03 21:37:17.177] Block solved after 79584069356407 shares at 68.0% diff

A miner of this size has about a 1 in 2800 chance of solving a block every day, or once every 8 years on average.

https://mempool.space/block/000000000000000000004c918a929cb2710b5376dcdd89e719c521dc5255115c

Well done!!!

Congrats to the miner and -CK for another block win.  Grin
Post
Topic
Board Pools
Merits 1 from 1 user
Re: [∞ YH] solo.ckpool.org 2% fee solo mining 300 blocks solved!
by
Nexus9090
on 03/07/2025, 16:28:24 UTC
⭐ Merited by willi9974 (1)
A block party is being held this weekend with an estimated up to 7EH where you can contribute your own hash or buy hash if anyone's interested:
https://upendo.rigly.io/

Interesting, but given the division of rewards its really not worth it for smaller rigs
You can buy hash directly with them to point instead of pointing your own miner.  Read through you can get a decent chunk of the reward

Thanks but I still don't think its worth it for the odds of getting a return.

If I want to buy hashrate then I'll do a solo run with a rental same risk greater reward.
Post
Topic
Board Pools
Re: [∞ YH] solo.ckpool.org 2% fee solo mining 300 blocks solved!
by
Nexus9090
on 03/07/2025, 07:14:10 UTC
A block party is being held this weekend with an estimated up to 7EH where you can contribute your own hash or buy hash if anyone's interested:
https://upendo.rigly.io/

Interesting, but given the division of rewards its really not worth it for smaller rigs
Post
Topic
Board Hardware
Merits 1 from 1 user
Re: How much PSU overload is possible with immersion setup
by
Nexus9090
on 02/07/2025, 21:01:57 UTC
⭐ Merited by MaxMueller (1)
I think destilled water is only relevant for watercooling, because the effort to keep it dielectic is too high, right?

Regarding the PSU the 92% Efficiency of Alphaminer PSU tells me that heat development of PSU (8%) is much less then heat development of Hashboards (92%). Is watercooling meaningful for PSU, due to "centralized" heat sources (like asics at the hashboards) or is it unsuitable?



Regarding coolant of immersion cooling i guess safety effort is a tradoff for other requierements. Obviously non flammable coolant is desirable, but i am not sure if one should take it absolute. For example pressurized Propan and Butan are coolants for heat pumps, low climate impact, low price, dielectric and good thermal characteristics, but flamable. I guess no one ever tried that as a coolant for mining hardware (i will neither), but i would not rule out that, because with highter safety effort the risk seems to be manageable.    

With 92% efficiency that equates to 80Watts dissipation per KW of load, so at 4KW load the PSU will be dissipating 320Watts of heat.

This is not insignificant and will definately need good thermal managment. I think the Alpha Miner PSU's are designed for immersion cooling, though they do seem to list forced air cooled models as well.

Using anything flammable as a coolant is asking for trouble.

Butane/Propane when used as a coolant is used as a non-contact refrigerant much like R134a air-con refrigerant and is typically passed through a compressor into a heat exchanger. It is not used as a direct contact coolant like with immersion cooling.


Post
Topic
Board Hardware
Re: How much PSU overload is possible with immersion setup
by
Nexus9090
on 02/07/2025, 17:07:31 UTC
if you are doing immersion.

I would do this buy a blow torch go out doors on a concrete pad or a sandy area.

get a cup of your coolant (does not apply if you used distilled waterblock system )

put the cup of coolant in a stainless steel  bowl

fire up the blow torch and see if the coolant burns.

some coolants are flammable and you do not want to use them to cool off 5000 watts of psu and

hashboards.

also test the coolant to see if it conducts electrical current on low levels it should not.

Good point!

The correct kind of liquid coolants for immersion cooling are typically PFPE (Perfluoropolyethers) such as Solvey Galden, which has a high dielectric strength (i.e. non conductive) is non flammable and non toxic.

Interesing side note, Galden PFPE is also used in vapour phase soldering for electronics.

IIRC its expensive depending on the temperature requirements.
Post
Topic
Board Hardware
Merits 2 from 2 users
Re: How much PSU overload is possible with immersion setup
by
Nexus9090
on 02/07/2025, 07:10:51 UTC
⭐ Merited by MaxMueller (1) ,philipma1957 (1)
~

That is the answer i hoped for. Not regarding the result but the expertise and deeper explanation. Thank you very much.



~

And this seems to be the right solution. I already stumbled over the website of alphaminer but i did not noticed any prices there and did not dig deeper. I guess i am going to look for some distributors in EU, even if I have no specific need for now.

You're welcome. I would suggest you avoid using unbranded power supplies, especailly those that do not carry safety marks on them CE, FCC, UL, NEMCO, TUV etc etc.

With unbranded PSU's you have zero guarantee that they pass even basic safety standards, given the operating powers can you really risk that?

If you decide to use one of those Alpha Miner power supplies, please ask the vendor for a copy of the safety approvals, even if they're just an importer they are responsible for ensuring product safety.

Safety first!
Post
Topic
Board Mining software (miners)
Re: help with cgminer
by
Nexus9090
on 01/07/2025, 20:02:01 UTC
Its perfectly normal and is typically infrequent, I believe it issued when a pool updates the block template because a new block has been placed to the network.

Post
Topic
Board Hardware
Merits 10 from 4 users
Re: How much PSU overload is possible with immersion setup
by
Nexus9090
on 01/07/2025, 17:09:54 UTC
⭐ Merited by vapourminer (4) ,NotFuzzyWarm (2) ,philipma1957 (2) ,MaxMueller (2)
Thank you for your response, but it is too generalized to answer the question.

Lets dig a little deeper, what electronic components will fail first and why?

Are there any components inside the PSU with some kind of insulation, so that external cooling will not help?
Are there any components with electron diffusion and/or rapid material aging, which will finally lead to failure?
Are the some side effects regarding the software or control units?
Are there any other harmful side effects i do not know yet?

Given your response, I guess you don't know an awful lot about electronics or power supply design.

I've been designing off-line switching power supplies for around 30 years.

You're making the assumptions that the original designers have allowed an overhead in their design of more than 30%, in general this could not be further from the truth. Most of the time designs are made to a price. So components tend to be heaviliy optimised for a particular operating condition, exceeding this will result in failures and these failures are not all down to operating temerature.

It is beyond the scope of a reply to teach you how switching power supplies work and what the weak points are in them. However a simplified list would be

A basic PSU design can be broken down into 4 sections

1) Primary rectification : Consisting of diodes or full FET (transistor) bridge, both approaches will be designed for a particular maximum operating current. Exceeding the specifications of the parts used will result in failure for diode and FET rectification they tend to fail short resulting in the primary fuse going open circuit (assuming the design has one), however in failing they often damage PCB and surrounding components.

2) Power factor correction: Following the primary rectification given the operating power, there will be some form of power factor correction circuit, the will have one or more switching elements consisting of FET's and rectification diodes or other rectification FET, the FET's will again have both voltage and current limits which when exceeded will cause permanent damage to them.

3) Depending on the swiching supply topology and for the kind of power required it is likely a full bridge forward converter or resonant LLC circuit, both of which are heavily complex designs having multiple FET switching elements, snubber circuits and output conditioning and smoothing all designed to meet a particular current and power requirement, you exceed the power design and permenent damage will be done, again not necesarily because of heat, but because you have exceeded the power delivery capablilities of the components in the design.

4) Control loop elements, operational amplifiers, opto-couplers, fixed and variable voltage references, protection and monitoring devices and the switching controller. These elements are less likely to fail but may fail as a result of parts in the power path failing short and delivering high voltages where they do not belong.

Hopefully if the design has been done properly there will be over current and over voltage detection at each stage of the power supply in order to prevent you from destroying the supply by overload, short circuit or by overvoltage.

Damage to components does not come purely from generated heat, although it is a significant factor in the failure of parts due to thermal run-away. Thermal run-away occurs where a part is driven beyond its operating limits and it starts to fail in such a way that it becomes resistive or its leakage current exeeds the devices capability, at which point they let out the magic smoke.

So all in all I reitterate what I said.

Overloading a high capacity power supply is A REALLY BAD IDEA!