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  #911  
Old 9th June 2018, 08:25 AM
ainarssems ainarssems is offline
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1 of the hashing boards on D3 has failed. It had issues disappearing before but was always fine after restart, now restarts does not help and it's just out of warranty now. Should have logged issue with Bitmain earlier. I did contact them and explained that it has been ongoing issue just have not logged it before but they refused to repair under warranty as it's 10 days out now. On the plus side they did offer to repair it with estimated costs $35 + shipping which is very reasonable I think but postage both ways will probably add quite a bit on top of that. I was considering buying another one instead as there are couple of cheap ones on ebay and just use one and keep other for spares, maybe sell control board on it's own, control board is the same for D3 and L3+ as well just different firmware. There was one yesterday in auction that I was looking at and it went for £204 with PSU which is very cheap considering PSU sells for about £115-130 on it's own, I did not bid on it as I have seen another one on BuyItNow with PSU for £200 so was going to buy that instead but that had disappeared by the time auction ended.
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  #912  
Old 9th June 2018, 10:42 AM
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I haven't been running my D3 for the last few months. Profitability on those things is so low that it's the first one that gets turned off as the weather warms up. I'll probably turn it back on again in autumn/winter -- a heater that makes a little money is better than a heater that makes no money at all I suppose.

I'm actually only running my B3, a few GPUs and a single S9 at the moment (the latter of which is in my customer's HVAC-equipped server room). It's too damn warm to run much else. If the weather cools a little, I'll probably turn one or more of my L3s back on, and then maybe an S9 but my D3 probably won't be back on until the outside temperatures are back into single figures. I have considered selling the D3 in fact.
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  #913  
Old 23rd June 2018, 04:09 PM
ainarssems ainarssems is offline
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This thread has gone a bit quite lately so I guess it's time for a bit of update.

With the recent price drops I am not earning much more that I spend in electricity and with my cheap electricity contract coming to the end 01/08/18 a and the cheapest available now being more that 10% more expensive than current I have been looking for ways to increase efficiency. I have not withdrawn any of crypto for about 4 months ( I have some spent for new miners though) and have been paying electricity from my own pocket but I cannot continue this way forever so probably looking to have least efficient miners to run on the timer only on nights with cheaper electricity, should help with cooling as well in the next weeks heat. D3 that has been low/no profit for a long time are now doing better than S9 or A3 even with only 2 boards working.

There have been several discussions about custom firmware for S9 and also A3 but there is nothing widely available. There are some people offering custom FW for S9 miner farms but with minimum qty of 100 miners. I have also this site offering S9 and A3 firmware so that you can tweak frequency and voltage for better efficiency but they are not cheap https://goprasoft.de/produkt-kategor...iner-software/

I was also thinking about the new S9i and fixed frequency firmwares on S9, I have tried both and they do work but increasing frequency with fixed firmware do not give more hashrate and they are both the same power consumption as stock firmware.

I was wondering also if L3++ firmware will work on L3+ and while I have not tried there are other people reporting that it works just fine, power consumption is higher but fan speeds are lower. I might try it a some point myself on one of my L3+'s.

It seems my suspicion about GPUs running Tensority algorithm have come true and there are now several miners for nVidia GPU's to run it. Single GTX 1080Ti can do 1.3kH/s compared to 0.78 stock or 1.0 kH/s of B3 and at lower power consumption, I have not tried myself because mine are rented out on Equihash ATM.

In the GPU front CN Heavy for AMD Cards payout have dropped considerably, I think it had a lot to do with NiceHash introducing CN-H on their platform and increasing network hashrate. Equihash has dropped a bit as well with ASICs coming online and some coins switching to alternative algorithmds like Equihash 144,5. I have been looking to swith my Tis to 144,5 as well but MR marketplace is a bit small ATM and only mineable coins are BitcoinZ and LitecoinZ which are not profitable. BTG should be switching to Equihash 144,5 in July as well so I am monitoring demand and payouts for this algo now and ready to switch.
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Last edited by ainarssems; 23rd June 2018 at 04:14 PM.
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  #914  
Old 24th June 2018, 09:49 AM
ainarssems ainarssems is offline
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Just to follow u on last nights post now that Equihash rental has ended for GTX 1080 Ti rig I tried it on Bytom. bminer that is supposed to do 1.3kH/s per card keeps getting errors and restarting all the time not doing any actual work, might need some settings tweaking. BTMiner_NebuTech is doing 0.8+ kH/s per card. So with 2 cards I am at 1.6kH/s and about 450W power consumption. B3 is getting 1.05kH/s with 445W power consumption. It was about 380-390W with Bitmain power supply but I needed that for another miner so I re-purposed older Corsair VX550 PC power supply for it by re-doing wiring. It is less efficient but losing 60W it's about £4-5 per month and with Bitmain or similar efficiency PSU costing over £100 it would take over 20 months to pay it back so for now I am running it on my old PSU.
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  #915  
Old 24th June 2018, 12:14 PM
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Quote:
Originally Posted by ainarssems View Post
So with 2 cards I am at 1.6kH/s and about 450W power consumption. B3 is getting 1.05kH/s with 445W power consumption.
I had read a few comments on Bitcointalk about GPUs out-performing the B3. Seems they were correct, judging by your findings. Some people are calling for Bitmain to release new firmware to enable the B3 to compete with GPUs but I wonder if there's really that much spare processing power available.
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  #916  
Old 24th June 2018, 01:00 PM
ainarssems ainarssems is offline
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I would not be surprised if there was more headroom for B3, it seems like they are artificially limited. It's the same like torque limiter maps in car ECUs. When you look at miner status some chains are doing 250 H/s and some just 100. you refresh and it's other way round. Same for autotune S9, 1 chain can be doing 6000, other 3000 and it changes over time but is average 4500 for S9 or 175 for B3. Also power increased only slightly going from 780-1000. I would not be surprised if it can do 1500-2000 with less than 600W, not sure if it could do much better.
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  #917  
Old 25th June 2018, 08:05 AM
ainarssems ainarssems is offline
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It appears bminer don't work on antpool but works just fine on f2pool, does 1.2kH/s per card but hf2pool has 2.5% fee while it is 0% on antpool. Also cards do heat up quite a lot and slow down, then temp goes down and they speed up a again. Need to check if they need dust cleaning or maybe additional fans supplying fresh air.

Edit

Switched fan speed for GPUs from auto to manual and set it to 91%, no more slowdowns.
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Last edited by ainarssems; 25th June 2018 at 08:25 AM.
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  #918  
Old 7th July 2018, 10:02 AM
ainarssems ainarssems is offline
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Some interesting developments - PCIe plug in FPGA cards that offer flexibility of GPU and performance/effieciency not far from ASICs. Low availability for now and pricey at $4-5k.

https://1stminingrig.com/your-chance...experts-alike/

http://zetheron.com/

https://bitcointalk.org/index.php?topic=3459858.0;all
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Last edited by ainarssems; 7th July 2018 at 10:24 AM.
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  #919  
Old 7th July 2018, 11:23 AM
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Interesting.

I do think that FPGA is the way forward -- performance similar to ASIC with the flexibility of GPU -- but they are a bit pricey right now.
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  #920  
Old 7th July 2018, 12:19 PM
ainarssems ainarssems is offline
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The prices should go down if they ramp up production. For now they have mostly been used for development/prototyping in relatively small numbers.. if they become mass produced costs will go down. at the moment single card can earn $40-50/ day with small selection of algorithms so not too bad for $4000 board if it pays back in less than 6 months. As more of them come online profitability will come down but as more algorithms are developed for them the hashing power will spread over them bringing profitability somewhat back up. I don't think they will make much competition for well developed ASICs like SHA256 o Scrypt but should be interesting for smaller networks and memory intensive algorithms with some new FPGAs with high speed memory bus coming out.

$4000 is a bit too much for me to at the moment and it seems they are sold out anyway, normal lead time is 2 weeks from Xilinx but at the moment it seems they are not available to order.

There are lesser FPGAs available from other manufacturers and at cheaper prices but with less performance and lacking a bit with soft development.

Could be a good time to buy some Xilinx shares or CFDs ( assuming they are publically traded) as they seem to be at the front of FPGAs and if the demand for they chips/boards goes up so should the share prices.
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