A/C= Trane 7.5 tons packaged unit exclusively used for mining room. I agree with your statements re L3 & S9 temps. Your max ambient is 34C v/s mine of 43C. You could drop 3-4C by blowing air 36” away from air intake (I used box fans 4,150 cfm ea) Could not use evaporative cooling (high relative humidity). This project was a proof of concept. Now building up a portable insulated 13’ container to house 96 ASICs with A/C And also building portable insulated 13’ container to house up to 192 ASICs without A/C to be located in a part of the country where max summer temp does not exceed 31C / 88F
@Raptor1 : holy crap! what tonnage is your AC unit? i am moving roughly the same amount of air here but no way do i think my house air conditioner would be able tocool that much air continously. my L3’s will run below 70C with a max ambient air temp of 85 fahrenheit. my S9’s will not run in that heat. however, if i turn the frequency down, i can pretty much run them in any temp. the hottest it has gotten here is about 93 Fahrenheit.
My outdoor (fresh air) temp is 41C and that is the intake temp of the ASICs. Without cooling, chip temps on an L3 was in the 85C++on D3s (95C –shut them down) S9s = 90C. Fans always on @100 % Was having board failures (XXXXXXXX). The INTAKE temp of the fan (not chip Temp) is now down to 23C instead of 41C. All ASICs running from 57-78C (depending on algo) Now I have zero failures been running with cooling for 2 weeks & also outdoor temp in shade peaked at 43C for a couple of days. No other option to cooling – tried massive airflow across the boards- it did help by bring down chip temps by about 4C but 41C ambient is way too high to be able to cool the chips. Will have to pay the 16% extra power cost to continue mining in summer. The cool bay is completely isolated from the hot bay
Raptor1 wrote: With outdoor fresh air temp of 41C, achieved ASIC intake temp of 23C using ducted air-conditioning. Moving 12,500 cfm of fresh air. Cooling & Air circulation increased power cost by 16.5%
On Bitmains I just set the fan to be 100% on all the time. I stay well under 70'C, show no issues, and do not pay 16% more electric for the same hashing power. So you got the miner to go down to 23'C...does it provide any more hashrate for the money spent to cool it? If it gets the same hashrate at 70'C as it does at 23'C why waste money to cool it for no gains?
Yeah - got my 1st Digibyte block - the miner says 2 blocks found in 25 minutes, but I assume the 2nd is not real. ANd no, it’s not solo mining Digibyte - I did the calculations and reckon I could pay for more than the block reward by specifying it as the payout coin.
alim wrote: Setting scantime to 1 second as Prohashing recommends .....When I first started 2 of my miners were classed as "not lucky" and didn’t earn at all until after some testing with Steve. Even now, they routinely drop to less than 75% of miner hashrate which can’t be solely attributed to work submissions (eg 100MH or 2THs less than the miner). Part of that is expected with higher difficulty, but mine are often connected for more than 2 minutes, and increases the likelihood that it will be stale.
They recommend that for BFG MINERS, NOT CGMINERS. Unless you are using a KNC TITAN from 5 years ago, likely does not apply if using bitmain asics that utilize STRATUM protocol implemented correctly. No settings would change the badluck. Your miners say 715MH but how many errors are they throwing that the overclocked units would hit only 75%? 2 minutes...you need closer to 2 hours to get accurate readings. You cant hash 2 minutes and get accurate readings.
@CSZiggy Hi - thanks for that. Setting scantime to 1 second as Prohashing recommends seems to help reduce the number of stale shares (routinely up to 40%) - When I first started 2 of my miners were classed as "not lucky" and didn’t earn at all until after some testing with Steve. Even now, they routinely drop to less than 75% of miner hashrate which can’t be solely attributed to work submissions (eg 100MH or 2THs less than the miner). Part of that is expected with higher difficulty, but mine are often connected for more than 2 minutes, and increases the likelihood that it will be stale.
alim wrote: now that the problems have been resolved, I’m only using the scantime setting as suggested.
Scantime was for BFGminers, not CGminers like bitmains. Are your restarts less than 1 second? Are you wasting resources asking to scan 2X as many as the rest of the pool miners to end up with the same restart times?
@cloaker thanks for your words of wisdom - my miners were definitely underperforming here - now that the problems have been resolved, I’m only using the scantime setting as suggested. Again, thanks - I’m glad to hear that others have not had the issues I’ve had.
have you ever mined under the auspice if it’s not broke con’t fix it? your messing with settings during specific periods the pool here was having intermittent problems. that is going in the opposite direction - you would be surprised how less is more with these miners
As for the L3, it’s clocking at 712MH, with the new tuning, I only need to set the scan time and then watch out for extra long work start penalties, whereas before my hash power was dropping off regularly.
jeffms2003 wrote: @Steve Sokolowski - On the expected payout chart on the homepage is there any way to expand the decimals for the equihash algorithm? It would be nice to know the daily calculated payout averages. Maybe there is already somewhere this is available. If so, could you point me there?
The numbers are wrong - that’s a known issue, but the priority of it is too low for us to fix it right now
@Steve Sokolowski - On the expected payout chart on the homepage is there any way to expand the decimals for the equihash algorithm? It would be nice to know the daily calculated payout averages. Maybe there is already somewhere this is available. If so, could you point me there?
Re Digibtye - it might be worth just asking to be paid in the coin - if you average 1 block every 3 to 4 days, you will receive 700 Digis - if you mine, you may earn that much or more at the current price.
i get 1 block per 3 miners ever 3-4 days.....i only try every 3 of 4 days so it works well- if i could identify why that works/luck id have it. 27$ per block reward makes that worth while and there would be others
same EXACT symptoms b4 we went all the way down....effeciency goes to hell- wrong info being displayed- pool hash rate looks like its being suppressed- yes keep your 2nd pool settings up to date- they get used a lot lately