[Review] Spondoolies SP20 review - A Green miner with a Loud fan - page 2.

johnyj

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Quote from: lulu2003 on January 21, 2015, 04:28:16 AM

let me try a fan / Noise summary:

simple exchange is not possible as SP20 uses a very special and tiny PWM Connector.
This connector seems to be a 1.5mm JST ZH 1.5mm 4-pin
(http://www.ebay.com/itm/Micro-Mini-JST-Connector-1-5mm-4-pin-w-Wire-x-10-sets-/161350482183) not 100% sure but 99%

to use the new smarter fan control you either try to order theses connectors or disassemble the stock fans one and solder etc.

as Sp20 comes with a high power 120x38mm fan that is specified up to 200 cfm and this amout of air may be needed in the next summer, I think we need to differ the CFM classes and target GH/s.

-1 safe as stock up to 1700 GH

-2 safe for medium hash rates and conditions

-3 safe for green underclocking (below 1100 GH)

class3 will be an easy one, many low flow 120x25mm fans will suffice and be nicely quiet and can be driven from external PSU.

tested replacement fans class 1-2:
Delta ? 1212 (afaik well known server fan?) high CFM
Scythe Kaze Ultra (38mm depth, medium-high flow) PWM?
are both really quieter at same flow?

Did anyone tried to stack fans in the fan-space of the sp20? there is a lot of room for bigger ones?!

please feel free to add your experiences like the firmware wish list!!!

I don't think 1700GH is practical unless you have free electricity, you could just buy coins instead of exchange electricity, heat and noise for it Wink

Delta fans are very good for server usage, previous king of high CFM fan
http://www.xtremesystems.org/forums/showthread.php?261778-120mm-Fan-Testing-on-an-MCR120-Radiator-Round-6

lulu2003

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let me try a fan / Noise summary:

simple exchange is not possible as SP20 uses a very special and tiny PWM Connector.
This connector seems to be a 1.5mm JST ZH 1.5mm 4-pin
(http://www.ebay.com/itm/Micro-Mini-JST-Connector-1-5mm-4-pin-w-Wire-x-10-sets-/161350482183) not 100% sure but 99%

to use the new smarter fan control you either try to order theses connectors or disassemble the stock fans one and solder etc.

as Sp20 comes with a high power 120x38mm fan that is specified up to 200 cfm and this amout of air may be needed in the next summer, I think we need to differ the CFM classes and target GH/s.

-1 safe as stock up to 1700 GH

-2 safe for medium hash rates and conditions

-3 safe for green underclocking (below 1100 GH)

class3 will be an easy one, many low flow 120x25mm fans will suffice and be nicely quiet and can be driven from external PSU.

tested replacement fans class 1-2:
Delta ? 1212 (afaik well known server fan?) high CFM
Scythe Kaze Ultra (38mm depth, medium-high flow) PWM?
are both really quieter at same flow?

Did anyone tried to stack fans in the fan-space of the sp20? there is a lot of room for bigger ones?!

please feel free to add your experiences like the firmware wish list!!!

johnyj

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Activity: 1988

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Quote from: keydogg on January 20, 2015, 10:56:44 AM

Hey Guys, just found this fan from Enermax:
http://www.enermax.de/luefter/twisterstorm/

154cfm at 38db.

I´m planning to use the SP20 in my living room, so I want to replace the stock fan and underclock to get about 1.0 - 1.2 GH/s. Priority is low noise, not W/GH.
You think this could work oder do I need more cfm output?

I read to whole thread but still not sure if its worth a try Undecided

Impossible to get 154 cfm at 38db for a 120mm fan, the best 120x38mm fan with 130CFM is already at 70db range, those figures from manufacturer are all marketing tricks

For underclock use, a 60CFM GT1850 with noise around 45db at 1 meter distance is the sweet spot, these are true numbers

Biodom

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Quote from: keydogg on January 20, 2015, 10:56:44 AM

Hey Guys, just found this fan from Enermax:
http://www.enermax.de/luefter/twisterstorm/

154cfm at 38db.

I´m planning to use the SP20 in my living room, so I want to replace the stock fan and underclock to get about 1.0 - 1.2 GH/s. Priority is low noise, not W/GH.
You think this could work oder do I need more cfm output?

I read to whole thread but still not sure if its worth a try Undecided

try new auto feature and underclock first, i suggest.

keydogg

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Hey Guys, just found this fan from Enermax:
http://www.enermax.de/luefter/twisterstorm/

154cfm at 38db.

I´m planning to use the SP20 in my living room, so I want to replace the stock fan and underclock to get about 1.0 - 1.2 GH/s. Priority is low noise, not W/GH.
You think this could work oder do I need more cfm output?

I read to whole thread but still not sure if its worth a try Undecided

Biodom

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Quote from: johnyj on January 20, 2015, 12:24:40 AM

Quote from: Biodom on January 18, 2015, 11:44:46 AM

Quote from: Biffa on January 16, 2015, 01:15:22 PM

Quote from: johnyj on January 14, 2015, 01:16:43 AM

Just received a couple of Gentle Typhoon AP-31 (5400RPM) for testing, this is a high-air-flow fan for 120x25 size, it performs almost identical to Delta AFC1212DE at 20% speed

I've got the 4250rpm version on my SP20 for a few weeks now. Also tried the Scythe Kaze Ultra, which works quite well, but is also hard to find.

Also from the same range the scythe kaze jyuni 1900rpm I've also tried, at 110CFM

None let you run at the same temps as the stock fan, all are significantly quieter even at full speed. With a slight underclock they are fine.

I got Scythe and would like to try. How did you connect it-to internal connector or to PSU through adapter? Thanks
i don't think that it has PWM anyway, so it does not matter, but Scythe is just 46dB (3000rpm, 133 CFM). Surely, it beats the SP20 stock fan by being quieter.
i am running SP20 at ~650W/1200GH anyway, so less sound would be great.

Since the stock fan uses a special connector, you have to run your fan with dedicated power supply outside of the box, thus can not utilize the auto-fan feature of the latest firmware. You either run it at full speed or use a voltage regulator to control the speed (regulator will overheat under high load, cool it with exhaust fan)

>snip image<

Thanks. I will try auto feature tomorrow am, not sure that it would be enough-so far Sp20 fan was persistently noisy (even at 20). If it goes down to 50ish in dB, then I don't have to bother. There is such thing as the physiological adaptation. A persistent sound at a reasonable dB will be ignored by the brain after a while. It is going up and down in dB and pitch that makes sound more noticeable.

johnyj

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Quote from: Biodom on January 18, 2015, 11:44:46 AM

Quote from: Biffa on January 16, 2015, 01:15:22 PM

Quote from: johnyj on January 14, 2015, 01:16:43 AM

Just received a couple of Gentle Typhoon AP-31 (5400RPM) for testing, this is a high-air-flow fan for 120x25 size, it performs almost identical to Delta AFC1212DE at 20% speed

I've got the 4250rpm version on my SP20 for a few weeks now. Also tried the Scythe Kaze Ultra, which works quite well, but is also hard to find.

Also from the same range the scythe kaze jyuni 1900rpm I've also tried, at 110CFM

None let you run at the same temps as the stock fan, all are significantly quieter even at full speed. With a slight underclock they are fine.

I got Scythe and would like to try. How did you connect it-to internal connector or to PSU through adapter? Thanks
i don't think that it has PWM anyway, so it does not matter, but Scythe is just 46dB (3000rpm, 133 CFM). Surely, it beats the SP20 stock fan by being quieter.
i am running SP20 at ~650W/1200GH anyway, so less sound would be great.

Since the stock fan uses a special connector, you have to run your fan with dedicated power supply outside of the box, thus can not utilize the auto-fan feature of the latest firmware. You either run it at full speed or use a voltage regulator to control the speed (regulator will overheat under high load, cool it with exhaust fan)

Biodom

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Quote from: Biffa on January 16, 2015, 01:15:22 PM

Quote from: johnyj on January 14, 2015, 01:16:43 AM

Just received a couple of Gentle Typhoon AP-31 (5400RPM) for testing, this is a high-air-flow fan for 120x25 size, it performs almost identical to Delta AFC1212DE at 20% speed

I've got the 4250rpm version on my SP20 for a few weeks now. Also tried the Scythe Kaze Ultra, which works quite well, but is also hard to find.

Also from the same range the scythe kaze jyuni 1900rpm I've also tried, at 110CFM

None let you run at the same temps as the stock fan, all are significantly quieter even at full speed. With a slight underclock they are fine.

I got Scythe and would like to try. How did you connect it-to internal connector or to PSU through adapter? Thanks
i don't think that it has PWM anyway, so it does not matter, but Scythe is just 46dB (3000rpm, 133 CFM). Surely, it beats the SP20 stock fan by being quieter.
i am running SP20 at ~650W/1200GH anyway, so less sound would be great.

Xircom

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For me noise is not an issue but heat, so I would like to hear if someone came up with a better fan solution than stock fan to increase cfm. I was wondering if this delta model could work. PFB1212UHE-F00. Its rated 252 cfm vs stock 216 cfm.
http://www.amazon.com/Delta-Electronics-PFB1212UHE-F00-120x120x38mm-connector/dp/B004Y15ALK

Biffa

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Quote from: johnyj on January 14, 2015, 01:16:43 AM

Just received a couple of Gentle Typhoon AP-31 (5400RPM) for testing, this is a high-air-flow fan for 120x25 size, it performs almost identical to Delta AFC1212DE at 20% speed

I've got the 4250rpm version on my SP20 for a few weeks now. Also tried the Scythe Kaze Ultra, which works quite well, but is also hard to find.

Also from the same range the scythe kaze jyuni 1900rpm I've also tried, at 110CFM

None let you run at the same temps as the stock fan, all are significantly quieter even at full speed. With a slight underclock they are fine.

Newar

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https://gliph.me/hUF

Quote from: johnyj on January 15, 2015, 06:38:01 PM

Why many guys seek extremely low temp just to raise the overclock potential, using even liquid nitrogen?
[...]

How about this?

Say an electronic part performs at best when it's at 60 degrees. An overclocker without Nitrogen would otherwise run it at 100, but the Nitrogen brings it back to 60.

What you are trying is to run at 40 and expect better results. But the part is not in its preferred range, so the efficiency is less.

johnyj

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Quote from: Newar on January 15, 2015, 09:38:59 AM

Quote from: johnyj on January 14, 2015, 08:34:57 PM

[...] it actually works better when the ambient temperature is higher. This is against my previous knowledge of electronics Huh

Not an electronic expert here, but batteries work better when warm as well. I think it may be that the materials which are used to make electronics have their specific characteristics, and an "temperature window" where they work best. Above and below not so much.

Why many guys seek extremely low temp just to raise the overclock potential, using even liquid nitrogen?

I have tested several times, at 0.61V, with a high speed delta fan, the highest achievable frequency is 700hz. With a slower fan GT1850 , that speed will jump to 740HZ. Since the efficiency is only related to voltage, I would like to keep the voltage as low as possible while pushing the frequency as high as possible. It seems that I can only achieve that with a slow and quiet fan GT1850 Grin

In traditional overclock, at a given voltage, to achieve higher frequency, you need better cooling. In GPU mining, ambient temp can go as low as -20c without any drop in performance. But SP20 will just die if the ambient temp drops below 0c degree

Newar

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Quote from: johnyj on January 14, 2015, 08:34:57 PM

[...] it actually works better when the ambient temperature is higher. This is against my previous knowledge of electronics Huh

Not an electronic expert here, but batteries work better when warm as well. I think it may be that the materials which are used to make electronics have their specific characteristics, and an "temperature window" where they work best. Above and below not so much.

johnyj

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Quote from: aclass on January 14, 2015, 01:31:19 PM

waiting for the results as i have a few AFC1212DE and i was thinking about replacing the stock fan with one of them

Quote from: johnyj on January 14, 2015, 01:16:43 AM

Just received a couple of Gentle Typhoon AP-31 (5400RPM) for testing, this is a high-air-flow fan for 120x25 size, it performs almost identical to Delta AFC1212DE at 20% speed

It seems that AFC1212DE have two version, one is 1.6A and one is 3A, I'm running the 3A version and it is 54dB at 20% speed with grille off

I'm waiting for some AFB1212SHE delivery, might be a little bit quieter. I think 120mm fan's limitation is around 100CFM (50CFM under load), anything beyond that will sounds like a vacuum cleaner thus not suitable for home running

The strange thing with SP20 is that when the temperature is low (DC module below 50 degree and ASIC runs low frequency), it tends to drop the frequency after a while, means it has an optimal operating temperature of at least 60 degrees, this seems to be true also for knc's miners, it actually works better when the ambient temperature is higher. This is against my previous knowledge of electronics Huh

aclass

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waiting for the results as i have a few AFC1212DE and i was thinking about replacing the stock fan with one of them

Quote from: johnyj on January 14, 2015, 01:16:43 AM

Just received a couple of Gentle Typhoon AP-31 (5400RPM) for testing, this is a high-air-flow fan for 120x25 size, it performs almost identical to Delta AFC1212DE at 20% speed

johnyj

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Just received a couple of Gentle Typhoon AP-31 (5400RPM) for testing, this is a high-air-flow fan for 120x25 size, it performs almost identical to Delta AFC1212DE at 20% speed

MrTeal

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Quote from: huffdaddy5 on January 08, 2015, 06:28:58 PM

How about this for an optional fan setup for 4 SP20s. Use a 14" 12V Radiator fan that pulls 2000cfm and mount it to a custom box made to hold 4 SP20 miners? The fan pulls up to 120W depending on how much voltage you send to it. The box would be made to hold miners 2 on top and 2 on bottom and just remove the stock fans completely? It would certainly pull enough air. The box would be made to only allow airflow through the miners? Could also be an option for 4 antiminer s5's as well.

PROCOMP 14" INCH ELECTRIC COOLING AUTOMOTIVE RADIATOR FAN 12 VOLT ($30 including shipping)
http://amzn.com/B003U7UR3A

Are you wanting to control the voltage to adjust fan speed in real time? If not, I have a few of these and they work great.
http://www.lowes.com/pd_416724-11292-SFC1-500B_0__?productId=4755301&Ntt=high+velocity+fan&pl=1¤tURL=%3FNtt%3Dhigh%2Bvelocity%2Bfan&facetInfo=
They move a ton of air, have a (manual) speed control switch, and it would be a lot simpler to interface than trying to PWM a big 10A fan.

pieran

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My two sp20 came in today (really, really fast shipment, thank you!) and running fine.

I ran it at default settings to get a feeling for it and with stock settings some ASICs reach 120c with fan at 90%. Ambient temperature is around 15c.
Trying to undervolt now to keep all ASICs at 115c max. Isn´t it possible to operate at around 1600 GH/s without overheating?

johnyj

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Unfortunately my apartment does not have a garage that can allow me to install extra circuit capacities, modern apartment are designed to be green with less electricity capacity (and also higher electricity cost because the electricity source is green). It costs me $0.2 per kwh, the only thing I can do is to squeeze enough hash power into 2 KW maximum load. I must be able to cook/wash cloth/dry hair etc without worrying about triggering the circuit breaker. And constant high load on wires could cause fire Tongue

huffdaddy5

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Quote from: lulu2003 on January 08, 2015, 07:07:31 PM

Quote from: huffdaddy5 on January 07, 2015, 06:50:40 PM

This would make a 15TH farm for $8815 running at 0.50W/GH efficiency for a total farm cost of $587/TH

operating three SP31 would be much easier... Grin

It would certainly be easier but they would use 9000W vs only 7500W.

I also see my math was off on that one as 7500W would be too much for a 240V 30amp breaker...

Topic: [Review] Spondoolies SP20 review - A Green miner with a Loud fan - page 2. (Read 20991 times)