Bitcoin Forum
June 16, 2021, 10:59:30 AM *
News: Latest Bitcoin Core release: 0.21.1 [Torrent]
 
  Home Help Search Login Register More  
  Show Posts
Pages: [1] 2 »
1  Local / Skandinavisk / Re: Bank i Danmark on: October 08, 2019, 09:50:56 AM
Hej Zeric.

Hvordan går det med dit miner projekt i dk? Still up and running?
Jeg er nysgerrig på at høre nærmere. Har du måske brug for hjælp?

(ps aktiver pm fra newbies)



Hej!

Projektet er netop lukket ned igen. Det gik egentlig ganske fint bort set fra én ting. Vi har endnu ikke kunne finde en bank der vil have med os at gøre. Derfor skylder skat os pt 150k i moms og elgodtgørelse som jeg IKKE har en firmakonto at udbetale til.

Sååå...
2  Economy / Computer hardware / [WTB] S9/S11/E3 Europe based, up to 100 pcs on: October 08, 2019, 09:39:29 AM
Hi all

As the title says, I'm looking to buy up to 100 pcs of S9 / S11 / E3. Must be europe based. Escrow only. No crazy prices please.
3  Economy / Exchanges / Re: New Crypto-Friendly Currency Accounts (From Wirex). on: November 04, 2018, 10:27:52 PM
Dear Wirex

I saw a post from you early this year saying business accounts would shortly be introduced. However, i have not been able to find any additional information on this.

Are they already live, or do you have an ETA?

Best,
4  Alternate cryptocurrencies / Mining (Altcoins) / Re: NEW BAIKAL MINER BK-G28 released. on: October 26, 2018, 06:48:34 PM
Dear Baikal

Perhaps you should update your webpage before you show a picture of a new product and a link to your website where it cannot be found.
5  Economy / Computer hardware / WTB Obelisk SC1 on: October 23, 2018, 10:33:59 AM
Im located in Europe, Denmark

Hit me up with your price. Looking to buy 2-4.

Best,
6  Economy / Computer hardware / Re: [WTS] -20% GPU FARM, 100+ Rigs, AIR SHIPPING WORLDWIDE, ESCROW on: October 22, 2018, 06:48:44 PM
Prices are getting better. Might be interested in some 1080 strix.

Not sure i understood it correctly: Does the original packaging and reciept come with a purchase?

Also, is that the bronze or gold version of the psu?
7  Alternate cryptocurrencies / Mining (Altcoins) / Re: Innosilicon releases A9 Zmaster 50ksol/s Equihash miner at 620W on: October 10, 2018, 01:34:47 PM
Hi guys

I'm having a few problems with my A9s and was wondering if anyone else has experienced the same. I browesed through most of this thread but didnt answers directly.

Temps are decent at 60-66 without modifying firmware. Place has pretty good ventilation.

Problem 1)
Every 1-2 weeks each miner crashes. Not as in reboots, but crashes so I have to manually go to my site and reboot them. Any experiences or fix for this?

Problem 2)
Im only getting 92-94% accepted rate. Poolside im at 142ish for 3 A9s.
Is this low accept rate normal?

Best,

Temps are really good.

Problem 1 - From my experience every A9 does that. For that reason the best way to solve it is to buy smart plugs so you can open/close the miner. A very detailed guide has been published from a user that even has a script to automatically restart the miners. I think he has TP-Link smart plugs.

Problem 2 - That depends on the pool that you are. The speeds are logical that you get. Try different pools to see if you can get lower errors and better hashing speed.

Thank you all for the helpful input.

I already have two HS110 laying around. Guess ill make a dyi adapter from PDU -> HS110 so i still have the safety of the PDU.

This guide, would you happen to have a link to it?



8  Alternate cryptocurrencies / Mining (Altcoins) / Re: Innosilicon releases A9 Zmaster 50ksol/s Equihash miner at 620W on: October 09, 2018, 08:52:34 PM
Hi guys

I'm having a few problems with my A9s and was wondering if anyone else has experienced the same. I browesed through most of this thread but didnt answers directly.

Temps are decent at 60-66 without modifying firmware. Place has pretty good ventilation.

Problem 1)
Every 1-2 weeks each miner crashes. Not as in reboots, but crashes so I have to manually go to my site and reboot them. Any experiences or fix for this?

Problem 2)
Im only getting 92-94% accepted rate. Poolside im at 142ish for 3 A9s.
Is this low accept rate normal?

Best,
9  Alternate cryptocurrencies / Mining (Altcoins) / Re: Efudd's Custom Z9 OC Firmware available! on: October 06, 2018, 01:25:46 PM
Has anyone experienced problems running 650 mhz and up on the standard bitmain provided awp3 psu? The 1370 watt drawn at 650 mhz seems disturbingly close to the 1600w max on the psu since 1600 x 0,8 = 1280.

Typically, this is not the meaning of PSU power limit.

You can run 1300W PSU like EVGA with on-the wall reading of up to 1430W just fine.
i am not sure why you are multiplying 1600 by 0.8.
First, only the worst PSUs have 80% efficiency (maybe APw3 is one of them, i don't know), which is a Bronze level.
Second, PSU indication of 1300w (EVGA) or 1600 (APW3) usually means power output limit (to miner) and not power input (measured at the wall) AFAIK.

That said, maybe Bitmain got it backwards, who knows.

The 0.8 comes from the so called 80% rule. It states that while electrical wirering in general and psu's in particular are able to perform at a 100% at peak intervals, running it long term is not safe above 80% or perhaps with good quality components at 85%. While a few might have good experiences running at a 100% for a long while, the 80% rule is more or less generally accepted. Smiley

EDIT: Just to clarify, the 80% has nothing to do with efficiency.

How 80% rule for home wiring relates to PSU?
80% simply means that on 15A circuit you should use no more than 12A continuously (derate 15A by 20%).
Many folks run EVGA 1300 at close to 100% for years (at certainly more than 100% of the nominal 1300 at the wall).
It's totally fine.

Because, to my understanding the 80% rule is not only applicable to home wirering but also to the psu itself. Check the link for more in dept explanation, especially the post by Philipma. According to him its about the psu output, not the draw at the wall though. So since apw psu is plat (right?) it would be 1600/0.92 = 1739. 1739 x 0.8 = 1391 or perhaps 1739 x 0,85 = 1478.
I would love to be wrong though Smiley

https://bitcointalk.org/index.php?topic=1971395.0

edit: just re-read. he says 80% rule for atx psu, not server psu. should be fine then Cheesy
10  Alternate cryptocurrencies / Mining (Altcoins) / Re: Efudd's Custom Z9 OC Firmware available! on: October 05, 2018, 10:31:34 PM
Has anyone experienced problems running 650 mhz and up on the standard bitmain provided awp3 psu? The 1370 watt drawn at 650 mhz seems disturbingly close to the 1600w max on the psu since 1600 x 0,8 = 1280.

Typically, this is not the meaning of PSU power limit.

You can run 1300W PSU like EVGA with on-the wall reading of up to 1430W just fine.
i am not sure why you are multiplying 1600 by 0.8.
First, only the worst PSUs have 80% efficiency (maybe APw3 is one of them, i don't know), which is a Bronze level.
Second, PSU indication of 1300w (EVGA) or 1600 (APW3) usually means power output limit (to miner) and not power input (measured at the wall) AFAIK.

That said, maybe Bitmain got it backwards, who knows.

The 0.8 comes from the so called 80% rule. It states that while electrical wirering in general and psu's in particular are able to perform at a 100% at peak intervals, running it long term is not safe above 80% or perhaps with good quality components at 85%. While a few might have good experiences running at a 100% for a long while, the 80% rule is more or less generally accepted. Smiley

EDIT: Just to clarify, the 80% has nothing to do with efficiency.
11  Alternate cryptocurrencies / Mining (Altcoins) / Re: Efudd's Custom Z9 OC Firmware available! on: October 05, 2018, 05:29:37 PM
Has anyone experienced problems running 650 mhz and up on the standard bitmain provided awp3 psu? The 1370 watt drawn at 650 mhz seems disturbingly close to the 1600w max on the psu since 1600 x 0,8 = 1280.

zeric, perhaps others will provide some input. I tested on APW7 and APW3s, both at 240V. I also considered the "80 percent" rule -- in fact, higher overclocks, if possible, may require the APW7 as you have pointed out. In my particular environment I monitored equipment with a thermal imaging camera and never found the APW3 to be outside of what I would have been worried about.


Are you experiencing problems, or just a question of concern? Regardless, I think this is an excellent question.

Jason


As we talked about on dicord I'm not experiencing problems since my z9s are still on their way to me Smiley However, I've read several places that 85% should be ok as well - if you have sufficient airflow. 1600 x 0,85 = 1360.

On paper it should be ok for 650 mhz, but more would probably be too much.

12  Alternate cryptocurrencies / Mining (Altcoins) / Re: Efudd's Custom Z9 OC Firmware available! on: October 05, 2018, 04:27:41 PM
Has anyone experienced problems running 650 mhz and up on the standard bitmain provided awp3 psu? The 1370 watt drawn at 650 mhz seems disturbingly close to the 1600w max on the psu since 1600 x 0,8 = 1280.
13  Alternate cryptocurrencies / Mining (Altcoins) / Re: [Dayun Zig Z1] Is it a thing? Lyra2Rev2 miner 6.8/GH on: September 26, 2018, 01:27:57 PM
Im not sure. Im itching to buy this miner myself, but dont trust those resellers. Too many bad experiences from other users. Not being able to find anything out about the manufacturer also scares me off.

As far as I've read the "trusted vendor" on asicminervalue is not worth much.
14  Economy / Computer hardware / Re: [WTB] ANY Antminer S9 (13 th/s+) W/ PSU - Small & Large Orders [USA] on: September 10, 2018, 06:00:26 PM
Would you care to comment on the connection to OhGodAGirl and the planned usage for the s9s?

Something is happening 🤑
15  Alternate cryptocurrencies / Mining (Altcoins) / Re: ETH mining: Seeking guide in English language on: September 03, 2018, 10:32:10 PM
If you choose to go down the GPU pathway rather than ASICs I would go with AMD cards. 570/580(etash) or vega 54 (monero). The 570/580 needs to be bios modded to function optimally for mining. Go to google or youtube for a guide.

I started out using Windows since I'm used to that and quite comfortable with it. However, there is a lot of issues with using windows for mining and after i switched to SMOS everything got A LOT easier. It is very easy to use and costs only 2$ a month per rig. Currently there is no support for Vega cards on it though.

For ASIC mining check out https://www.asicminervalue.com for profitability. You can put in your powercost at the very bottom.



16  Alternate cryptocurrencies / Mining (Altcoins) / Re: Innosilicon A9 or Antminer Z9? on: September 03, 2018, 10:25:24 PM
... and now I see the A9 is sold out. baah
17  Alternate cryptocurrencies / Mining (Altcoins) / Re: Innosilicon A9 or Antminer Z9? on: September 03, 2018, 10:22:14 PM
If you look enough, you'll hear bad things about both companies... Neither Bitmain or Innosilicon is going to win any customer service awards.   I've used both for years now, and in general I find their quality to be about the same, with maybe a slight edge to Innosilicon.  I have some A9's right now and have found them to perform to spec and be pretty reliable, but obviously some people on the forum have had different experiences - but the challenge is always that I'm not going to come on the forum and make a post like "All my A9's work fine!", because that's expected, you're only going to post when there's a problem.  I've had machines repaired by both companies - neither was good at the time, as it took a ton of time to do.

Personally I think the A9 is a better option than the Z9 - the efficiency difference means a longer effective life, and more better return.

Thank you for that answer! Exactly what I was looking for.

I've seen that the Z9 mini (especially batch 1) can overclock to great extent. I'm guessing same would go for the Z9. Have you tried to OC your A9? If so, how was the results?
18  Alternate cryptocurrencies / Mining (Altcoins) / Innosilicon A9 or Antminer Z9? on: September 03, 2018, 05:54:50 PM
Hi Guys!

I'm having trouble to decide which equihash asic to buy. Im looking to get 4 to start.

On paper inno A9 seems better in the long term due to lower power consumption. However, I head a lot of bad things about this company. Does anyone have experience with a A9?

Thanks!
19  Alternate cryptocurrencies / Mining (Altcoins) / Re: Advice needed: 80k USD mining adventure on: August 30, 2018, 06:20:18 PM
Thank you for all your replies. They are much appreciated!

I live in europe, and GPU prices in my country are still quite high (around 750 usd for a vega 56 or 350 usd for a rx 580 8gb) which is part of the reason why ASICs seems the better choice.


I don't know where you are located but if you have 80k to invest it would be best to buy a small house by adding another small amount of money , in US a good small house cost about 150k depending on the state you are located.

If you are firm on your decision and you want to go with a mining adventure, my advice would be to buy 50% of the money , your favourite miners and the rest of money to buy bitcoin,ethereum,litecoin and zcash, the top 4 major coins and hold.

A house here would be at least 300k usd, with a maximum of 40 amps.. so buying isnt really an option im afraid. At least i have cheap rent Smiley

OP, I'll try to be on topic and not direct you to buy coins with the money Cheesy

The question here, which I hope you already calculated, is have you turned a profit? If you have, that's good, you know what you're doing.  Wink

Since you were saying you have started mining with GPUs at the beginning of the year, you probably know already that ASICs are not like GPUs in the sense that they will probably become obsolete (or how these guys here want to call them: "door stoppers"  Cheesy ) and you won't be able to use them anymore for mining once the algorithm for your target coins changes.
In some cases, ASIC manufacturers announce their new ASICs when the most profitable coin states that it will change the algorithm to be ASIC resistant (see the Monero & Baikal case study).

If I were you, I would research more in the FPGA market rather than ASICs. FPGAs can be programmed to work even if the algorithm changes but you won't have the same hashing power compared to what the ASICs have.

Hope this helps Wink

I did turn a decent profit. Got on the Raven wave quite early Smiley
I do know the problem with asics turning into heavy paper weights after a while. Expensive GPU prices is part of what pushes me towards asics though, see above.


-snip-
But what about this?:
I am almost done setting up the place with airflow, security, network and the works.

What to buy?
I am thinking I will start off with:

2 x Antminer Z9
1 x Innosilicon A9 (would focus more on these if it wasn't for all the bad things i read about Innosilicon)
1 x Pangolin Whatsminer DCR (november is a long time away though)
5 x Whatsminer M 10.

Which is about 25k USD give or take.
If you're going for ASICs, do not buy multiple brands and models, research for the one that has the highest profitability but not the ones that targets any "CPU-mining" & newly developed (including suspicious) algorithms .

The advantages of that are easier maintenance and "more efficient mining" of the coin of your choice.
That way, it will be easier to reach the capital return and even ROI in a shorter period of time, the other way around IMO have more disadvantages.
But if you want to expand and add diversity, your original plan (Add GPU Miners) can still be applied.

Today's a risky season for miners, it's up to you.

Could you elaborate on this? I get the maintenance part, but more efficient mining? how so?


FPGAs... I dont feel comfortable jumping into this. My tech skills are decent but nowhere near what it looks like is needed. Perhaps in time when more algos are opened up.

I'll meet with my investor this weekend and see how he feels about a split scenario.

EDIT to fix quote error.
20  Alternate cryptocurrencies / Mining (Altcoins) / Advice needed: 80k USD mining adventure on: August 29, 2018, 10:54:06 PM
Hello dear fellow miners!

Disclaimer: This post does not belong completely in The Altcoin nor in the BTC mining sub forum, if you are a moderator, feel free to move the thread as you feel appropriate.

I have been small home GPU-miner since the beginning of the year, and have spend hundreds and hundreds of hours on research. Unfortunately I dont really have anyone to spar with. I am hoping some of the pros here on bitcointalk might help point me in the right direction.

The situation:
I recently recieved a 80k USD investment to expand my small home mining farm operation. While i might use some of the cash on investment in cryptos the majority is expected to go into mining. Please keep this in mind before you type BUY BTC. 

I have a cheap (300 usd/month) facility with up 300 amps at 220v. I pay around 0.055 usd/kwh).

I am almost done setting up the place with airflow, security, network and the works.

Initially I was planning on a 50/50 GPU/ASIC split, but as the marked looks a full ASIC focus seems the obvious choice to me.

The problem:

What to buy?
I am thinking I will start off with:

2 x Antminer Z9
1 x Innosilicon A9 (would focus more on these if it wasn't for all the bad things i read about Innosilicon)
1 x Pangolin Whatsminer DCR (november is a long time away though)
5 x Whatsminer M 10.

Which is about 25k USD give or take.

Then hold on to the remainder of the cash for a few months, waiting for new hardware to surface. The Avalon A9 seems as a good option, depending on pricing.

What do you guys think? Any feedback is much appreciated !
Pages: [1] 2 »
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!