disassemble it and put fans on each board!
as soon as i will get my sp20, i will try some overclocking
Topic: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs - page 220. (Read 1260290 times)
December 28, 2014, 02:45:47 PM
put it somewhere with access to cold outside air: balcony, garage, on the window...
disassemble it and put fans on each board!
as soon as i will get my sp20, i will try some overclocking
disassemble it and put fans on each board!
as soon as i will get my sp20, i will try some overclocking
December 28, 2014, 02:17:26 PM
This thread turned the: how to downclock the SP20.... 
I'd like to push them to as much ghs as I can....
Any ideas to improve cooling?
What I see the stock heatsinks are too small to keep the asics cool for countinous 1700ghs.
I was able to reach it for a while but I needed 15-16 C intake.
The average what I can get is 1590-1660 ghs stable, but with 120C asics at the back of the machine.
Are here anybody who not downclocked them and tried something out?
Edit: my fans on 100% and i don't care the noise.
I'd like to push them to as much ghs as I can....
Any ideas to improve cooling?
What I see the stock heatsinks are too small to keep the asics cool for countinous 1700ghs.
I was able to reach it for a while but I needed 15-16 C intake.
The average what I can get is 1590-1660 ghs stable, but with 120C asics at the back of the machine.
Are here anybody who not downclocked them and tried something out?
Edit: my fans on 100% and i don't care the noise.
December 28, 2014, 12:59:13 PM
Philipma...am I right in reading that your efficiency is 0.39???
no that is another miner running at lower clocks in a colder area.
for the most part my sp20's do 460 to 490 watts and 1025 to 1075 gh.
So I am just under .48 at the kwatt meter.
this one is using 460 watts or 460/1015 = .448 watts a gh at the kwatt meter
this one is in a spare bedroom the others are all in my attached garage since I have 7 in their it is warmer and they do a little worse around .48
i also think that your intake temp is too high, it should be bellow 25 degree
December 28, 2014, 12:49:22 PM
Philipma...am I right in reading that your efficiency is 0.39???
no that is another miner running at lower clocks in a colder area.
for the most part my sp20's do 460 to 490 watts and 1025 to 1075 gh.
So I am just under .48 at the kwatt meter.
this one is using 460 watts or 460/1015 = .448 watts a gh at the kwatt meter
this one is in a spare bedroom the others are all in my attached garage since I have 7 in their it is warmer and they do a little worse around .48
i also think that your intake temp is too high, it should be bellow 25 degree
December 28, 2014, 12:41:50 PM
I'm looking at automating the setting of voltage on a daily basis to maximize profitability. For those interested, I whipped up a quick formula for calculating your maximum profit with an SP20 using 2GOOD's efficiency numbers.
LN((20116.26*(BR/D)*P)/(0.00417093689255513*C))/0.001368351
BR = Block reward
D = Difficulty
P = Bitcoin Price
C = cost of electricity (in $/kWh)
There's no bound on it, so obviously if it gives you >1700 or <800, you'd have to limit it.
LN((20116.26*(BR/D)*P)/(0.00417093689255513*C))/0.001368351
BR = Block reward
D = Difficulty
P = Bitcoin Price
C = cost of electricity (in $/kWh)
There's no bound on it, so obviously if it gives you >1700 or <800, you'd have to limit it.
December 28, 2014, 12:11:31 PM
Philipma...am I right in reading that your efficiency is 0.39???
no that is another miner running at lower clocks in a colder area.
for the most part my sp20's do 460 to 490 watts and 1025 to 1075 gh.
So I am just under .48 at the kwatt meter.
this one is using 460 watts or 460/1015 = .448 watts a gh at the kwatt meter
this one is in a spare bedroom the others are all in my attached garage since I have 7 in their it is warmer and they do a little worse around .48
December 28, 2014, 11:16:04 AM
Philipma...am I right in reading that your efficiency is 0.39???
December 28, 2014, 11:02:40 AM
dimaforwork is an an account of one of our sw developers.
when I get the next 2 I will be back to 9 in house.
I will send all 9 to mmpool.org I would like to see if it does what the s-3's do on that pool.
Ie the first 8 work and the 9th miner does not mine at mmpool.org or the rollover pools. Not quite the same as the other guys problem but in my case 8 good the ninth bad. It the other guys case he had 9 pools listed on 1 sp20 was good with 8 not with nine.
I find that interesting .
December 28, 2014, 10:58:26 AM
dimaforwork is an an account of one of our sw developers.
December 28, 2014, 10:57:22 AM
My SP20 went non-responding yesterday after I added a couple of pools. The web admin GUI never came back after submitting the change, and I could not ssh into the device. It responded to pings, but that was it.
I power cycled the unit and attempted further edits to the pool list. It seemed to work for a little while, then the SP20 hung again.
Operating on a guess that maybe I had specified too many pools, I rebooted again so that I could remove some. Once I saw pings responding, I quickly fired up the web admin GUI and stopped the miner. This allowed me to get back to the pool list and remove a few. Since doing that, the SP20 has run reliably again.
Is there a known problem with too many pools? I had 9 pools specified at the time that the machine went non-responding. I know that's a stupid large number of pools, but I've just been moving disused pools to the bottom of the list with the thinking that if I needed them again, I could just change the order.
If the miner craps out after too many pools are defined, then the UI should probably limit the number that you can specify.
Note that this was with the v2.5.52 firmware.
I power cycled the unit and attempted further edits to the pool list. It seemed to work for a little while, then the SP20 hung again.
Operating on a guess that maybe I had specified too many pools, I rebooted again so that I could remove some. Once I saw pings responding, I quickly fired up the web admin GUI and stopped the miner. This allowed me to get back to the pool list and remove a few. Since doing that, the SP20 has run reliably again.
Is there a known problem with too many pools? I had 9 pools specified at the time that the machine went non-responding. I know that's a stupid large number of pools, but I've just been moving disused pools to the bottom of the list with the thinking that if I needed them again, I could just change the order.
If the miner craps out after too many pools are defined, then the UI should probably limit the number that you can specify.
Note that this was with the v2.5.52 firmware.
well 9 makes me think that 8 is max. I have the same problem if I try to run 9 s-3's on mmpool.org So maybe the coding maxes at 8 .
I don't have 9 sp20's in house but I bet you that 9 on 1 name won't work at mmpool.org
It could be just a coincident event that 8 works and 9 does not. but both miners use cgminer. maybe there is a limit of 8 pools.
It is strange problem, can you please provide list if your pools?
December 28, 2014, 10:50:54 AM
try backing down the .77 to .75 yeah you may stay at 1600 but more stable show us this page
see all of mine are 85c due to under clock if you have a lot of 120 or 125c you are just a bit too much overclocked
As requested. I find it strange that I have such a variance in temps...or is that normal?
no the heat sinks are
_________ ____________
air flow >>>>> fan air flow >>>>
_________ ____________
So the air from the back two heat sinks gets pulled past the front two heat sinks thus two sets of numbers are always a bit higher.
You are close to perfect with your numbers that one with the 120 is setting 4.
you could set the startup volts to .685 for number 4 and drop the watts setting by 10 watts.
then check you asics again. if you get all at no more then 115 you are good to go.
I am running 7 in my garage so high clocks are a no go. I get about 1100gh an sp20 but I get to run 7 of them using around 4200 watts.
I have high power price of 10 cents in the winter allowing for the bonus heat.
December 28, 2014, 10:27:01 AM
try backing down the .77 to .75 yeah you may stay at 1600 but more stable show us this page
see all of mine are 85c due to under clock if you have a lot of 120 or 125c you are just a bit too much overclocked
As requested. I find it strange that I have such a variance in temps...or is that normal?
http://i61.tinypic.com/avodp3.jpg
December 28, 2014, 08:21:24 AM
Hello mr S
you are wright
was my mistake
i have to explain to you have you have my unit working!!!!!
sorry ghas.io is not the main pool but?
i have to explain what he have to do, that´s really bad
you have a problem with hosting ( 7 days ) i can proof(there was a problem in ----)
i know not the right thread
sorry , but sp-tech write me hosting is identified from sp-tech
3 options was there i maybe choose the worste one
you are wright
was my mistake
i have to explain to you have you have my unit working!!!!!
sorry ghas.io is not the main pool but?
i have to explain what he have to do, that´s really bad
you have a problem with hosting ( 7 days ) i can proof(there was a problem in ----)
i know not the right thread
sorry , but sp-tech write me hosting is identified from sp-tech
3 options was there i maybe choose the worste one
December 28, 2014, 07:45:22 AM
I've been reading the posts and just thought I would throw my 0.0006369BTC regarding temps, psu and hash speed...
I use 1 HP Common Slot 1200W Server PSU with a Gigampz BB per SP20. I'm not concerned with noise and power is cheap. I am guessing that the spikes in the "last day" chart is the SP trying to auto correct for the PSU but I'm not sure. If anyone has some thoughts I'd welcome them.
I use 1 HP Common Slot 1200W Server PSU with a Gigampz BB per SP20. I'm not concerned with noise and power is cheap. I am guessing that the spikes in the "last day" chart is the SP trying to auto correct for the PSU but I'm not sure. If anyone has some thoughts I'd welcome them.
try backing down the .77 to .75 yeah you may stay at 1600 but more stable show us this page
see all of mine are 85c due to under clock if you have a lot of 120 or 125c you are just a bit too much overclocked
December 28, 2014, 07:21:15 AM
...
Ps. i didn't hear any plant to complain about noise till now
http://www.treehugger.com/corporate-responsibility/free-music-to-make-your-plants-grow.html Ps. i didn't hear any plant to complain about noise till now
December 28, 2014, 06:44:01 AM
I've been reading the posts and just thought I would throw my 0.0006369BTC regarding temps, psu and hash speed...
I use 1 HP Common Slot 1200W Server PSU with a Gigampz BB per SP20. I'm not concerned with noise and power is cheap. I am guessing that the spikes in the "last day" chart is the SP trying to auto correct for the PSU but I'm not sure. If anyone has some thoughts I'd welcome them.
http://i58.tinypic.com/9gafb9.jpg
I use 1 HP Common Slot 1200W Server PSU with a Gigampz BB per SP20. I'm not concerned with noise and power is cheap. I am guessing that the spikes in the "last day" chart is the SP trying to auto correct for the PSU but I'm not sure. If anyone has some thoughts I'd welcome them.
http://i58.tinypic.com/9gafb9.jpg
December 28, 2014, 05:53:37 AM
Very nice. Incoming temp 11 C helps a lot with the cooling
yeah that 11 c is the key to staying over 1600gh
to anyone that can do this (provide 11c temps) and has cheap power whynot
December 28, 2014, 02:23:40 AM
Very nice. Incoming temp 11 C helps a lot with the cooling
December 28, 2014, 01:12:17 AM
It's not hard to keep the SP20 running at high speed with 20% fan. You just need some fresh air.
December 28, 2014, 12:36:55 AM
To reach anywhere near max performance (1.7TH +/- 10%) they need to be somewhere very cool (sub 10°C) and have the fans running at min 80 speed, just make sure you can keep them somewhere where noise isn't an issue
You can run them at 1.5TH with 40-50% fans at 20-25°C ambient and they are tolerable in say a separate room.
Or you can replace the fans and underclock them and keep them under your bed
They're going into a half rack in a datacenter, so noise isn't an issue, I'm just going to have to monitor the cooling and see how the temps interact with them. The datacenter is kept at 20°C.
Has anyone built an enclosure or shelf for these to go into standard 19" 4 post racks?
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