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August 16, 2022, 03:37:30 AM *
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1  Bitcoin / Hardware / Alpha Miner APW9 replacement, PSU-4KBM17 on: February 25, 2022, 11:26:35 PM
I picked up a couple of the Alpha Miner APW9 replacement PSUs, just did a comparison with a Bitmain APW9 and it looks great. It's a bit quieter and in my test case used 40W less power (2265W vs 2305W) in identical conditions.

We'll have to wait and see if it is reliable, but I doubt it will be worse than Bitmain's...

Also has a wider voltage operating range, 200-280.



2  Economy / Computer hardware / [WTS] T17 Hashboards on: December 20, 2021, 02:24:32 AM
I have a bunch of T17 hashboards that I will be putting up for sale as I go through my inventory and test/repair them.

These are T17 boards, not T17+. Typical performance for a T17 miner on stock firmware is ~50W/th at ~40TH, around 13.3TH per hashboard.

I should be able to configure the hashboard to work with your miner on stock firmware if the buyer sends a kernel log, but I can't guarantee that (yet). So you may have to use aftermarket firmware that doesn't care what is burnt into the eeprom in the hashboards.

I'm offering them with a 120-day warranty. If the hashboard goes down, the buyer can return the board at their cost and I'll repair or replace it. I'll cover the shipping back to the buyer.

Escrow accepted at buyer's expense.

Payment in BTC.

I will also consider trades. If you have a bunch of dead miners we can work out a dead miner for working hashboards trade to get some of your miners back up with no out-of-pocket cost.

Other things I'd be willing to trade for are: Dead S17 or S17pro hashboards (not S17+), working APW9 PSUs, working S17 or T17 control boards.

If you have 3 or more dead S17 or S17pro hashboards, I can offer a 1 to 1 trade for working T17 hashboards so you can make use of your empty slots. The PSU, control board, and case, are identical between the T17, S17, and S17pro, so you can convert a dead S17 to a working T17 to get some more hash back online. You'd just need to consolidate your working hashboards to free up a full miner for the conversion (you can't mix T17 and S17 boards in the same miner).

If you have an S17+ with 3 dead hashboards, I can offer a trade for a fully working T17 miner if I have enough extra parts to build them on hand.

I have a huge backlog of my own hashboards to repair, so I can't offer any repairs for your hashboards, I can only offer the sale or trade of the boards I have.

Shoot me a PM if interested.



The "in" box...



Latest batch of 6 hashboards testing... looks like they will be off to Ebay soon.


Code:
2022-01-15 02:01:45 driver-btm-api.c:205:set_miner_status: STATUS_INIT
2022-01-15 02:01:49 driver-btm-api.c:205:set_miner_status: STATUS_OKAY
2022-01-15 02:01:55 driver-btm-api.c:1325:dhash_chip_send_job: Version num 4
2022-01-15 02:01:59 thread.c:401:check_working_voltage: current PCB min temperature is 35
2022-01-15 02:01:59 thread.c:402:check_working_voltage: current voltage is 18.00V, recovery to 17.10V
2022-01-15 02:01:59 power_api.c:397:slowly_set_iic_power_to_working_voltage: slowly setting to voltage: 17.10 ...
2022-01-15 02:02:37 power_api.c:124:check_voltage_multi: retry time: 0
2022-01-15 02:02:39 power_api.c:86:get_average_voltage: chain[0], voltage is: 17.150654
2022-01-15 02:02:40 power_api.c:86:get_average_voltage: chain[1], voltage is: 17.175146
2022-01-15 02:02:42 power_api.c:86:get_average_voltage: chain[2], voltage is: 16.997578
2022-01-15 02:02:42 power_api.c:97:get_average_voltage: aveage voltage is: 17.107793
2022-01-15 02:07:41 thread.c:441:is_zero_nonce_happened: chain_nonce[0] = 17480
2022-01-15 02:07:41 thread.c:441:is_zero_nonce_happened: chain_nonce[1] = 17669
2022-01-15 02:07:41 thread.c:441:is_zero_nonce_happened: chain_nonce[2] = 18378
2022-01-15 02:32:42 thread.c:214:calc_hashrate_avg: avg rate is 42630.00 in 30 mins
2022-01-15 02:32:42 temperature.c:450:temp_statistics_show:   pcb temp 42~54  chip temp 67~80
2022-01-15 03:02:44 thread.c:214:calc_hashrate_avg: avg rate is 42427.88 in 30 mins
2022-01-15 03:02:44 temperature.c:450:temp_statistics_show:   pcb temp 44~54  chip temp 67~80
2022-01-15 03:32:45 thread.c:214:calc_hashrate_avg: avg rate is 42631.93 in 30 mins
2022-01-15 03:32:45 temperature.c:450:temp_statistics_show:   pcb temp 44~54  chip temp 67~81
2022-01-15 04:02:46 thread.c:214:calc_hashrate_avg: avg rate is 42826.27 in 30 mins
2022-01-15 04:02:46 temperature.c:450:temp_statistics_show:   pcb temp 45~55  chip temp 68~82
2022-01-15 04:32:48 thread.c:214:calc_hashrate_avg: avg rate is 42583.11 in 30 mins
2022-01-15 04:32:48 temperature.c:450:temp_statistics_show:   pcb temp 45~55  chip temp 68~82
2022-01-15 05:02:49 thread.c:214:calc_hashrate_avg: avg rate is 42545.16 in 30 mins
2022-01-15 05:02:49 temperature.c:450:temp_statistics_show:   pcb temp 45~55  chip temp 69~82
2022-01-15 05:32:50 thread.c:214:calc_hashrate_avg: avg rate is 42779.51 in 30 mins
2022-01-15 05:32:50 temperature.c:450:temp_statistics_show:   pcb temp 45~56  chip temp 68~82
2022-01-15 06:02:51 thread.c:214:calc_hashrate_avg: avg rate is 42460.90 in 30 mins
2022-01-15 06:02:51 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 69~82
2022-01-15 06:32:53 thread.c:214:calc_hashrate_avg: avg rate is 42617.59 in 30 mins
2022-01-15 06:32:53 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 69~83
2022-01-15 07:02:54 thread.c:214:calc_hashrate_avg: avg rate is 42490.18 in 30 mins
2022-01-15 07:02:54 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 68~83
2022-01-15 07:32:55 thread.c:214:calc_hashrate_avg: avg rate is 42573.09 in 30 mins
2022-01-15 07:32:55 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 68~83
2022-01-15 08:02:57 thread.c:214:calc_hashrate_avg: avg rate is 42302.31 in 30 mins
2022-01-15 08:02:57 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 69~83
2022-01-15 08:32:58 thread.c:214:calc_hashrate_avg: avg rate is 42871.81 in 30 mins
2022-01-15 08:32:58 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 69~83
2022-01-15 09:02:59 thread.c:214:calc_hashrate_avg: avg rate is 42627.84 in 30 mins
2022-01-15 09:02:59 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 68~83
2022-01-15 09:33:00 thread.c:214:calc_hashrate_avg: avg rate is 42598.24 in 30 mins
2022-01-15 09:33:00 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 68~83
2022-01-15 10:03:02 thread.c:214:calc_hashrate_avg: avg rate is 42619.84 in 30 mins
2022-01-15 10:03:02 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 68~83
2022-01-15 10:33:03 thread.c:214:calc_hashrate_avg: avg rate is 42630.90 in 30 mins
2022-01-15 10:33:03 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 69~83
2022-01-15 11:03:04 thread.c:214:calc_hashrate_avg: avg rate is 42265.88 in 30 mins
2022-01-15 11:03:04 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 69~83
2022-01-15 11:33:06 thread.c:214:calc_hashrate_avg: avg rate is 42466.11 in 30 mins
2022-01-15 11:33:06 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 69~83
2022-01-15 12:03:07 thread.c:214:calc_hashrate_avg: avg rate is 42850.43 in 30 mins
2022-01-15 12:03:07 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 68~83
2022-01-15 12:33:08 thread.c:214:calc_hashrate_avg: avg rate is 42589.46 in 30 mins
2022-01-15 12:33:08 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 68~83
2022-01-15 13:03:09 thread.c:214:calc_hashrate_avg: avg rate is 42717.01 in 30 mins
2022-01-15 13:03:09 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 68~83
2022-01-15 13:33:11 thread.c:214:calc_hashrate_avg: avg rate is 42663.86 in 30 mins
2022-01-15 13:33:11 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 68~83
2022-01-15 14:03:12 thread.c:214:calc_hashrate_avg: avg rate is 42520.07 in 30 mins
2022-01-15 14:03:12 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 68~83
2022-01-15 14:33:13 thread.c:214:calc_hashrate_avg: avg rate is 42624.62 in 30 mins
2022-01-15 14:33:13 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 69~83
2022-01-15 15:03:15 thread.c:214:calc_hashrate_avg: avg rate is 42687.30 in 30 mins
2022-01-15 15:03:15 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 69~83
2022-01-15 15:33:16 thread.c:214:calc_hashrate_avg: avg rate is 42540.16 in 30 mins
2022-01-15 15:33:16 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 69~83
2022-01-15 16:03:17 thread.c:214:calc_hashrate_avg: avg rate is 42645.28 in 30 mins
2022-01-15 16:03:17 temperature.c:450:temp_statistics_show:   pcb temp 46~56  chip temp 69~83
2022-01-15 16:33:18 thread.c:214:calc_hashrate_avg: avg rate is 42565.36 in 30 mins
2022-01-15 16:33:18 temperature.c:450:temp_statistics_show:   pcb temp 43~56  chip temp 63~83
3  Bitcoin / Pools / Why use a PPS pool when there are large PPLNS pools? on: December 05, 2021, 11:04:27 PM
Just wanted to get people's reasoning, since most people seem to choose PPS.

Take, for example, ViaBTC. Current pool hashrate is >20000PH, which gives about 18 blocks a day on average. So 126 blocks a week, and 540 blocks a month.

Using some Poisson magic...

The chances of finding 100 blocks or less when you'd expect 126 is 1 in 100. That would be about 20% (or more) less reward than expected once every couple of years.

The chances of finding 486 blocks or less when you'd expect 540 is 1 in 100. The chances of finding 486 or more is 99.1%.

Is it really worth paying more fees to avoid such a small chance of getting 10% less in a given month?

In the span of a year, it would be 1 in 1000 to find 4% fewer blocks, 1 in 100 to find 3% fewer, 1 in 10 to find 2% fewer.

Of course, it goes the other way too, so you can also get more blocks than expected.

Also, with a PPS pool, how do you know what fee you are actually paying? Just based on expected earnings? How would you know if you are getting the right amount of transaction fees (for pools that include it)? Do any publish the formula they use for calculating the transaction fee amount included in the payout?



4  Bitcoin / Mining / Hosts are dropping like flies... or at least dropping me on: November 20, 2021, 07:58:47 PM
I have some miners up at Cryptoboreas who announced earlier this year that they will be shutting down and clients will have until April to get their miners out. That was disappointing, and a huge pain in the ass since I'm in USA and would have to pay $1000s in duties to get them back. But at least they gave us plenty of time to get things figured out.

Now I just got an email from another host I use in NY that they will not be renewing my contract and will be shutting down my miners at the end of the month. I've been month-to-month with them for years, but still ... not even 2 weeks notice?

Guess that's just the nature of the business. But when I made the investment in the miners I did not consider the fact that if profitability goes up too far, these hosts will drop you as soon as possible so they can utilize their own capacity. And once you get dropped, good luck finding any place to host your 1 gen old miners in a bull market.

So looks like come April I'll be down to a single S17pro running in my garage, as long as it's profitable to run at 23c/kwh, or until I find a better option. But that option is a lot less likely to be a host. I'm going to try very hard to figure something else out... time to start begging my relatives with cheap power in upstate NY to let me set up on their property... I'm already researching immersion cooling since I know the noise will be an issue. Ugh.

5  Bitcoin / Mining speculation / Bitmain S19XP, 140TH @ 21.5W/TH on: November 11, 2021, 06:18:44 PM
Pretty impressive. The tweet says sales have begun, but there's no mention of it on their website.

6  Economy / Computer hardware / [WTB] Bitmain 17 series case parts on: April 28, 2021, 12:39:36 AM
Specifically looking for control board enclosures... I need about 30 or so of them.

7  Bitcoin / Mining support / Is the S19 control board compatible with the S17 miner? on: March 05, 2021, 04:56:41 PM
Does anyone know if the S19 control board compatible with the S17 miner? Has anyone tried it and been successful?

I sent the question to Bitmain support a week ago and haven't received an answer.

The instructions for setting up an S19 control board on Bitmain's website say that replacement S19 control boards are shipped with S17 firmware, so it seems like it would work. But it isn't explicitly said anywhere.

https://support.bitmain.com/hc/en-us/articles/900003173106

S19, S17+, and S17 control boards are also sold by ZeusBTC, so I asked them if their S19 board could be used in a S17 and they just replied "No", with no further explanation.
8  Economy / Computer hardware / [WTB] Dead S17, S17 pro, S17+ on: January 26, 2021, 04:13:02 PM
Looking for S17 series miners with dead hashboards.


If you've got multiple miners with dead hashboards, I can help you consolidate good boards into fully working miners and I'll buy the dead ones.


Send me a PM with what you've got and the condition, and I'll make you an offer.

Will pay BTC using forum escrow.
9  Economy / Computer hardware / [WTS] Avalon 3x 1047 and a 1041 on: December 04, 2020, 02:50:53 AM
Looking to sell 4 1047s and 1 1041. One of the 1047s has a dead PSU. I tested it with one of the working PSUs and it runs fine.

They were running for about 6 months at a hosting facility.

Looking for $1750 + shipping + escrow for the lot.

update:

one sold, now looking for $425 + shipping + escrow for each of the 1047s and 1041 with working PSUs, $225 + + for the 1047 with the dead PSU.
Or $1275 + shipping + escrow for the rest.


Three 1047s sold, now looking for $500 + shipping + escrow for the 1047 or 1041 with working PSU.


10  Economy / Computer hardware / [WTB] Non-working S17pro or hashboard for parts on: September 28, 2020, 02:17:41 PM
I'm going to take a stab at repairing an S17pro I have with a dead dashboard, so I'm looking for another dead dashboard, or a dead S17pro to use for parts.




11  Economy / Computer hardware / [WTS] 2x Avalon 1047 on: July 01, 2020, 01:16:05 AM
Looking to sell two Avalon 1047, 37TH @ 2380W. Been running since October in a hosting facility in upstate NY.

Trusted forum escrow is welcome.

Asking $400 each plus shipping plus escrow fee. Payment in BTC.
12  Economy / Computer hardware / [WTS] 2x Avalon 1066 - SOLD on: June 29, 2020, 11:51:36 PM
Looking to sell two Avalon 1066, 50TH @ 3250W. Been running since January in a hosting facility in Labrador, Canada.

Trusted forum escrow is welcome.

Asking $550 each plus shipping plus escrow fee. Payment in BTC.
13  Economy / Digital goods / SOLD [WTS] Bitmain Coupon, $314, 10% max, 1/31/2020 expiration on: November 23, 2019, 04:31:05 PM
Asking $115. Payment via BTC.

Trusted forum escrow welcome at buyers expense.




14  Economy / Digital goods / [WTB] Bitmain Coupons on: November 18, 2019, 11:30:44 AM
Looking to buy "Order Coupons" only through forum escrow.
15  Bitcoin / Mining speculation / Smaller PPLNS pools getting hammered by halving, rebound after? on: October 23, 2019, 06:51:51 PM
I have some gear coming online in the next couple of months, so I have been thinking about what pool to point them at.

I'm not interested in pps pools, so I'm only really looking at PPLNS. The issue is ramp up/ramp down.

For a 20PH pool, ramp up is now 161 days. Looks like diff is going to jump up to 13.6T in a few hours, so it will go to 169. With a bunch of new gear coming online, diff will could be >16T by the end of the year, and ramp up will go to >198 days.

For a 6500PH pool, ramp up at 13.6T diff is only half a day.

With just over 200 days to the halving and difficulty increasing, pointing new gear to a 20PH PPLNS pool means you might barely be fully ramped up before the halving. That means that any new gear pointed to a 20PH pool now will only get about half the reward between now and the halving compared to the 6500PH pool. During the eventual ramp down on the small pool post halving, I'd get only 50% what I put in on the ramp up, so I'd loose 25% of the reward for that 6 month ramp up. As much as I'd like to support the small pool, I can't donate 25% of my rewards for over 6 months, and I'm going to have to go with the 6500PH pool.

Right after the halving though, this is no longer an issue, so I'll start moving my rigs to the smaller pool. I'm assuming many other miners are in the same boat, I'd expect hashrate at smaller pools to take off after the halving.

If a miner fully ramped up on a 20PH pool changed pools now to a 6500PH pool, they might be fully ramped down on the small pool by the halving. But while they ramp down, they'd be fully ramped up on the big pool so they'd earn 1.5X normal on average between now and the halving. That's a lot of pressure for miners to jump ship, but I suspect many would come back after the halving. If a lot of people bail, then the ramp down would get extended further into post-halving, and they'd get less, but still more than sticking it out at the small pool.

Any holes or miscalculations in my reasoning?
16  Bitcoin / Hardware / Canaan Announces 11 Series on: October 12, 2019, 01:33:46 PM
Canaan apparently announced their 11 series the same day as Bitmain announced the S17+ and T17+.

A1166 - 68th at 47 w/th
A1146 - 56th at 57 w/th

No details on when they will be available.

https://news.8btc.com/bitmain-canaan-launch-70t-cryptocurrency-miners-prepared-for-the-upcoming-bitcoin-halving

This article claims slightly different numbers. 70th @ 46 w/th for the A1166 and 58th - 61th for the A1146

https://news.bitcoin.com/4-new-high-powered-bitcoin-miners-revealed/





Update: February batches now posted on https://canaan.io/store/





17  Economy / Service Discussion / Any USA based people here have miners hosted in Canada? on: September 20, 2019, 04:05:05 PM
Any USA based people here have miners hosted in Canada? Just curious if anyone here has done this and if you ran into any issues.
18  Bitcoin / Mining speculation / <$0.05 Power on Natural Gas on: September 04, 2019, 03:39:59 PM
Anyone using a natural gas generator to power your mining farm?

A few years back I got a backup generator that runs on natural gas installed at my home. It's spec. sheet listed the fuel usage, so I did the calculations to see how much it cost to run per kWh and found it came out to about $0.10 per kWh, which is about half of what I pay the utility for electricity. It's a standby generator, so it could not be run continuously, and it's loud enough that my neighbors would kill me if ran it 24/7 anyway, but it got me curious so I did some research on larger prime power generators and natural gas prices around the USA.

Natural Gas Prices by State - https://www.chooseenergy.com/data-center/natural-gas-rates-by-state/

Industrial rates for gas in some states are really low. The lowest right now is Oklahoma, at $2.14/1000 ft^3.

Using $2.14/1000 ft^3, and specs from Generac's website for their large generators that are rated for prime power, I came up with these #s. I estimated the maintenance charges based on ranges this company gave for service contract rates. I did not take into account the cost of purchasing the generator, only the operating cost and gas cost. On the larger side of things, if you could purchase a 2nd hand SG750 for $200,000 (wild guess based on what I'm seeing on ebay...) and spread that cost over a 5 year run time at 75% load, it would come out to $0.00812/kWh.



Generac SG150 14.2L, including $800/per month for maintenance

75% load 112.5kW, $0.0426/kWh
50% load, 75kW, $0.0511/kWh



Generac SG250, including $1000/month for maintenance

75% load, 187.5kW, $0.0349/kWh
50% load, 125kW, $0.0416/kWh



Generac SG450, including $1200/month for maintenance

75% load, 337.5kW, $0.0315/kWh
50% load, 225kW, $0.0351/kWh



Generac SG750, including $1500/month for maintenance

75% load, 562.5kW, $0.0258/kWh
50% load, 375kW, $0.0289/kWh
19  Economy / Computer hardware / [SOLD] Nvidia 1070 and 1080 GPUs -- 1.5 years later and one 1070 8Gb remains... on: August 10, 2019, 07:25:14 PM
Prices do not include escrow and shipping. Ships from Zip code 02494.

---------------------

MSI 1070 Gaming X 8G **** SOLD

Asking $250

The card is in great condition and in original packaging.  I ran the FurMark burn-in test on it for 30 minutes with no issues. Both fans operate smoothly.

edit: been sitting in the box under my desk since I originally posed this 1.5 years ago .... lol.





---------------------

Last 2 Asus 1080s now on ebay but offer here is still valid until it sells.

https://www.ebay.com/itm/273978520544


--------------------

** Sold on Ebay **

Asus ROG-STRIX-GTX1080-A8G-GAMING #2

Asking $290

The card is in great condition and in original packaging.  Warranty is good until 12/3/2020. I ran the FurMark burn-in test on it for over an hour with no issues. All three fans operate smoothly.

https://imgur.com/a/xjDxFvJ


--------------------

** Sold on Ebay **

Asus ROG-STRIX-GTX1080-A8G-GAMING #3

Asking $290

The card is in great condition and in original packaging.  Warranty is good until 12/3/2020. I ran the FurMark burn-in test on it for 36 minutes with no issues. All three fans operate smoothly.

https://imgur.com/a/LkAhjys


--------------------

Gone ... Sold on Ebay.

Asus ROG-STRIX-GTX1080-A8G-GAMING  

Asking $290

The card is in great condition and in original packaging.  Warranty is good until 12/3/2020. I ran the FurMark burn-in test on it for 57 minutes with no issues. All three fans operate smoothly.

https://imgur.com/a/65ofBUA

Now on ebay, but offer here is still valid until it sells.
https://www.ebay.com/itm/273969675401


--------------------

20  Economy / Computer hardware / SOLD [WTS] Older GPUs - FREE on: August 07, 2019, 02:34:34 PM
Going through a bunch of 6000 and 5000 series Radeon GPUs I've had sitting on a shelf for years. I'm testing each one, and will list the rest as I get around to them.

Don't want to go though the effort of testing the rest and listing on ebay, and don't want to send them to the dumpster, so just pay shipping and take one or more batches of 4 or 5 cards.

There are 14 total, 3 of which I've tested an know are working. So for every 4 or 5 you take one can be a tested one.

To estimate shipping, figure cards weigh about 1.5lbs each, and they'll be shipped from zip 02494. I can pack them up and send final box dimensions and weight, and you can email a shipping label.




---------
Untested Cards:
1x - XFX 6950 single fan
1x - XFX 6950 dual fan
1x - Gigabyte 6950
1x - Sapphire 5850
1x - Gigabyte 5850
5x - ATI 5850 Reference
1x - Powercolor AX7790


---------

Tested Cards:
---------

AMD 6950 Reference - $35










---------

XFX 6870 - $25









----------

XFX 6870 - $25













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