Unofficial Spondoolies SP20 thread - page 17.

notlist3d

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Quote from: crk on April 07, 2015, 03:48:17 PM

Quote from: philipma1957 on April 07, 2015, 02:40:17 PM

Quote from: crk on April 07, 2015, 10:59:32 AM

This is the config i'm running on my SP20s... i'm using a PSU EVGA1300

you are drawing 24c/75f air in which is not bad for intake

you are pushing 77c/171f air out which is high , but you are pushing the gear at 1555gh.

what will you do for cooling this gear in the summer heat?

once your intake gets to 32c in the summer you will not be able to run at 1555gh.

i have an AC running 24*7 at 2 ft from the miners so they are always getting cooled air right into them..

i live in Venezuela so we always are at 32c xD

do u think i can improve that configuration ?

I would think you could. With the SP20's I have never had heat issues. Worst miner I had was a SilverFish 28 Scrypt miner first gen longer I had it more issues. I had to eventually keep a AC near it or performance would drop.

The ambient for sp 20's should be "0 °C to 35 °C". So your very very close to top end. But I'm guessing you could do more with moving air and exhust out. AC just is a little expensive to run for miners.

crk

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Quote from: philipma1957 on April 07, 2015, 02:40:17 PM

Quote from: crk on April 07, 2015, 10:59:32 AM

This is the config i'm running on my SP20s... i'm using a PSU EVGA1300

you are drawing 24c/75f air in which is not bad for intake

you are pushing 77c/171f air out which is high , but you are pushing the gear at 1555gh.

what will you do for cooling this gear in the summer heat?

once your intake gets to 32c in the summer you will not be able to run at 1555gh.

i have an AC running 24*7 at 2 ft from the miners so they are always getting cooled air right into them..

i live in Venezuela so we always are at 32c xD

do u think i can improve that configuration ?

philipma1957

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'The right to privacy matters'

Quote from: crk on April 07, 2015, 10:59:32 AM

This is the config i'm running on my SP20s... i'm using a PSU EVGA1300

you are drawing 24c/75f air in which is not bad for intake

you are pushing 77c/171f air out which is high , but you are pushing the gear at 1555gh.

what will you do for cooling this gear in the summer heat?

once your intake gets to 32c in the summer you will not be able to run at 1555gh.

crk

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This is the config i'm running on my SP20s... i'm using a PSU EVGA1300

HerbPean

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Soooo here my experience with the RMA.

First, if you don't run your machine in a perfect condition (Not like me cracking a window so the intake got fresh air), you might want to think 2 time before sending your machine back. BTW, my other machine was next to this one and it's still run rock solid. (1654gh) So I guess that was a bit of bad luck ...

So as I was using my SP20E close to a cracked windows they found some corrosion near a capacitor. Also dust (because I didn't want to open it to void the warranty) and it's not under warranty because of the corrosion. Both ASIC 0 and 4 on each blade (which are the first one next to intake) are in bad shape.

Asking 200$ (105$ shipping and 95$ for the diagnose) for the exact same machine.

Asking 250$ per board to replace them plus the 200$ us.

Sooooo next time you run one of those close to a windows. You should keep it home I guess. Open it yourself, have a look or find a electronic specialist to have a look. It will save you time and you machine.

If I knew, I would simply disable the Asic and keep like this ...

but now for 200$ us ?

Not even sure it worth to get it back ...

philipma1957

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Quote from: miguelmorales85 on April 07, 2015, 07:38:05 AM

Quote from: maracuchoff on April 06, 2015, 08:51:10 PM

Hello, I have a sp20 which is powered by 2 corsair 850w sources each
I can connect these two sources one sp20 and s3 +?
configuration which is more advisable to do so?
thank you for your comments

Join us at Mineros Venezolanos in G+
https://plus.google.com/communities/107092443621317279862

and check the Sp20 section

I just requested to join.

miguelmorales85

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Quote from: maracuchoff on April 06, 2015, 08:51:10 PM

Hello, I have a sp20 which is powered by 2 corsair 850w sources each
I can connect these two sources one sp20 and s3 +?
configuration which is more advisable to do so?
thank you for your comments

Join us at Mineros Venezolanos in G+
https://plus.google.com/communities/107092443621317279862

and check the Sp20 section

alh

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Quote from: maracuchoff on April 06, 2015, 09:42:48 PM

could you suggest me a suitable configuration please?

Here's what I run on my SP20:

Start Voltage: 0.63 / 0.63 / 0.63 / 0.63
Max Voltage: 0.69
Max Watts 160 / 140 / 160 / 140

The result is 1167 GH/s, and all ASICs less than 95C. Power draw at the wall is very close to 600W.

maracuchoff

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could you suggest me a suitable configuration please?

notlist3d

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Quote from: maracuchoff on April 06, 2015, 08:51:10 PM

Hello, I have a sp20 which is powered by 2 corsair 850w sources each
I can connect these two sources one sp20 and s3 +?
configuration which is more advisable to do so?
thank you for your comments

Personally I run at a under clock with more efficiency and summer coming. I love my SP20's running at around 640-650 watts total getting around 1.1T. If you underclock you easily could run with a single 850 watt PSU

maracuchoff

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Hello, I have a sp20 which is powered by 2 corsair 850w sources each
I can connect these two sources one sp20 and s3 +?
configuration which is more advisable to do so?
thank you for your comments

alh

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I just wanted to give you an option to consider. If it works best for you to adjust only "Max Volts" until you keep all the loops "cool enough" , that's great. If you want to try and get it "just right" (for you), then you might want to the the "Loop Power Control" method and see how it works for you. I am not trying to convince you of anything, just providing an option to consider.

miguelmorales85

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Quote from: alh on April 03, 2015, 05:38:15 PM

I can't get at my machine at the present time (I am at work). The values I put up weren't mean to be a canned recipe for maximum performance. Each machine is a bit different because of the variability of the individual ASIC's that are inside. The point was to illustrate that you may be able to cool off one specific loop by adjusting it's power usage, and favor a cooler loop with more power. The external environment will also impact how hot your loops run, though Loops 0 & 2 will always be cooler than Loops 1 & 3, with the normal air flow through the machine.

I run my SP20 with a target power draw in mind, and don't go for maximum speed. As the weather warms up here in Minnesota, I'll dial it down in terms of power and speed to fit better my condition in the lower level of my home. I also have to worry a bit about the noise, though my wife hasn't complained yet.

if you get the 0 $ 2 loops to work at a higher voltage they will heat up the air that will go to loop 1 & 3. So you will have to lower the voltage on them to keep the temp low. In the end you will increase hashing in two chips and lower at the other two, in that process you could end as if the voltaje set to them were the same.

alh

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I can't get at my machine at the present time (I am at work). The values I put up weren't mean to be a canned recipe for maximum performance. Each machine is a bit different because of the variability of the individual ASIC's that are inside. The point was to illustrate that you may be able to cool off one specific loop by adjusting it's power usage, and favor a cooler loop with more power. The external environment will also impact how hot your loops run, though Loops 0 & 2 will always be cooler than Loops 1 & 3, with the normal air flow through the machine.

I run my SP20 with a target power draw in mind, and don't go for maximum speed. As the weather warms up here in Minnesota, I'll dial it down in terms of power and speed to fit better my condition in the lower level of my home. I also have to worry a bit about the noise, though my wife hasn't complained yet.

miguelmorales85

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Quote from: alh on April 03, 2015, 05:18:28 PM

I'll also add that using the "power Setting" for each loop is a good way to get you some finer control. While you can set a "Starting Voltage" for each loop, there is only one "Max Voltage" that applies to all the loops. I've had a fair amount of luck with setting each loop based what makes it work the best without getting to warm. Consider the following example:

Loop 0: 210
Loop 1: 190
Loop 2: 210
Loop 3: 180

The values here reflect the fact that Loop 0 runs the coolest, and Loop 3 runs the hottest. If you try and control the whole machine with just "Max Volts", then you probably have to dial it down low enough to handle the hottest loop, while the cooler loop isn't running at quite it's maximum speed. You can see by the "lim=288" on each of the PSU lines, that all the loops are not power constrained at all. Loops 0 & 2 are closest the cool air intake end, and Loops 1 & 3 are essentially "downstream" and get air that's already been warmed up by Loops 0 & 2. In my experience you need to give it at least an hour or more on a setting to see how the temperatures shake out.

I really think that it's more effective to try and control "loops" rather than by controlling "Max Volts".

what are the results of that config? could you upload a picture of the asic status and setting screens?

alh

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I'll also add that using the "power Setting" for each loop is a good way to get you some finer control. While you can set a "Starting Voltage" for each loop, there is only one "Max Voltage" that applies to all the loops. I've had a fair amount of luck with setting each loop based what makes it work the best without getting to warm. Consider the following example:

Loop 0: 210
Loop 1: 190
Loop 2: 210
Loop 3: 180

The values here reflect the fact that Loop 0 runs the coolest, and Loop 3 runs the hottest. If you try and control the whole machine with just "Max Volts", then you probably have to dial it down low enough to handle the hottest loop, while the cooler loop isn't running at quite it's maximum speed. You can see by the "lim=288" on each of the PSU lines, that all the loops are not power constrained at all. Loops 0 & 2 are closest the cool air intake end, and Loops 1 & 3 are essentially "downstream" and get air that's already been warmed up by Loops 0 & 2. In my experience you need to give it at least an hour or more on a setting to see how the temperatures shake out.

I really think that it's more effective to try and control "loops" rather than by controlling "Max Volts".

philipma1957

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Quote from: btcmuscle on April 03, 2015, 01:10:05 PM

Quote from: philipma1957 on April 03, 2015, 08:50:14 AM

Quote from: btcmuscle on April 03, 2015, 12:43:48 AM

Hi,

Sort of new at this. I have 2 units and I seem to can't get a good hash/temp ratio. Both units are hitting 120 on one loop. I want the most hashing power while keeping the temps below 120. Any recommendations?

Thanks,

Vince

lower your settings. I am guessing you purchased used machines. they were pushed hard and sold to you. make the settings all 0.010 volts lower

0.66 down to 0.65
0.66 down to 0.65
0.66 down to 0.65
0.66 down to 0.65

max
0.67 down to 0.65

I do not know want your settings are but I am giving an example

tell me your firmware 2.6.14 is the newest

set the fans to 80

I want you to be at 115 c or less not 120 c

Yep, they were both bought used. I'll try these settings when I get home after work. Thank you!!

yeah they all have a sweet spot around 1250gh to 1300gh. you are just a little higher then you need to be to hit that sweet spot

btcmuscle

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Quote from: philipma1957 on April 03, 2015, 08:50:14 AM

Quote from: btcmuscle on April 03, 2015, 12:43:48 AM

Hi,

Sort of new at this. I have 2 units and I seem to can't get a good hash/temp ratio. Both units are hitting 120 on one loop. I want the most hashing power while keeping the temps below 120. Any recommendations?

http://s14.postimg.org/lu12hxx35/Screen_Shot_2015_04_03_at_1_40_51_AM.png

http://s14.postimg.org/3v1t6z6pt/Screen_Shot_2015_04_03_at_1_40_41_AM.png

Thanks,

Vince

lower your settings. I am guessing you purchased used machines. they were pushed hard and sold to you. make the settings all 0.010 volts lower

0.66 down to 0.65
0.66 down to 0.65
0.66 down to 0.65
0.66 down to 0.65

max
0.67 down to 0.65

I do not know want your settings are but I am giving an example

tell me your firmware 2.6.14 is the newest

set the fans to 80

I want you to be at 115 c or less not 120 c

Yep, they were both bought used. I'll try these settings when I get home after work. Thank you!!

philipma1957

legendary

Activity: 4256

Merit: 8551

'The right to privacy matters'

Quote from: btcmuscle on April 03, 2015, 12:43:48 AM

Hi,

Sort of new at this. I have 2 units and I seem to can't get a good hash/temp ratio. Both units are hitting 120 on one loop. I want the most hashing power while keeping the temps below 120. Any recommendations?

Thanks,

Vince

lower your settings. I am guessing you purchased used machines. they were pushed hard and sold to you. make the settings all 0.010 volts lower

0.66 down to 0.65
0.66 down to 0.65
0.66 down to 0.65
0.66 down to 0.65

max
0.67 down to 0.65

I do not know want your settings are but I am giving an example

tell me your firmware 2.6.14 is the newest

set the fans to 80

I want you to be at 115 c or less not 120 c

btcmuscle

newbie

Activity: 3

Merit: 0

Quote from: miguelmorales85 on April 03, 2015, 07:20:14 AM

Quote from: btcmuscle on April 03, 2015, 12:43:48 AM

Hi,

Sort of new at this. I have 2 units and I seem to can't get a good hash/temp ratio. Both units are hitting 120 on one loop. I want the most hashing power while keeping the temps below 120. Any recommendations?

http://s14.postimg.org/lu12hxx35/Screen_Shot_2015_04_03_at_1_40_51_AM.png

http://s14.postimg.org/3v1t6z6pt/Screen_Shot_2015_04_03_at_1_40_41_AM.png

Thanks,

Vince

those rates seems pretty good to me. The key is the inlet air temp. You have 31° so it's quite nice for them.

1,6 TH! I wish i could make them that high.

Do you have them on A/A?

Hi! Is there any danger to have one loop on each hitting 120? And what is A/A? I don't have any additional cooling. They're in my basement so its fairly cool down there. Anyone try a laptop cooler? Thoughts on that?

-Vince

Topic: Unofficial Spondoolies SP20 thread - page 17. (Read 126192 times)