[Review] Spondoolies SP20 review - A Green miner with a Loud fan - page 4.

raskul

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Quote from: Guy Corem on December 30, 2014, 11:57:22 PM

Quote from: ChineseSavior on December 30, 2014, 10:43:51 PM

someone said they had free shipping? I even rmemeber them using this as one of there reasons to order spondoolies and not bitmain... Huh

?

they are trying to charge me for shipping or am i missing something?

Order through RoadStress GB link.

not long til it's over!
get in quick!
https://bitcointalksearch.org/topic/m.9924866

Guy Corem

donator

Activity: 1414

Merit: 1051

Spondoolies, Beam & DAGlabs

Quote from: ChineseSavior on December 30, 2014, 10:43:51 PM

someone said they had free shipping? I even rmemeber them using this as one of there reasons to order spondoolies and not bitmain... Huh

?

they are trying to charge me for shipping or am i missing something?

Order through RoadStress GB link.

Biodom

legendary

Activity: 3892

Merit: 4331

Quote from: ChineseSavior on December 30, 2014, 10:43:51 PM

someone said they had free shipping? I even rmemeber them using this as one of there reasons to order spondoolies and not bitmain... Huh

?

they are trying to charge me for shipping or am i missing something?

order on ebay with free shipping...

ChineseSavior

sr. member

Activity: 366

Merit: 250

someone said they had free shipping? I even rmemeber them using this as one of there reasons to order spondoolies and not bitmain... Huh

?

they are trying to charge me for shipping or am i missing something?

Biodom

legendary

Activity: 3892

Merit: 4331

Quote from: klondike_bar on December 30, 2014, 09:28:09 PM

sounds like the S5 has the SP20 beat for use at ~1250GH/630W or ~0.51w/GH

well, very close, but S5 has this crazy fan-my amazon fan supply for mod (got both Noctua and Silverstone) will be here only on Friday-I even had to get the prime trial which I never wanted in order to get it faster..

klondike_bar

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ASIC Wannabe

sounds like the S5 has the SP20 beat for use at ~1250GH/630W or ~0.51w/GH

johnyj

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Activity: 1988

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Beyond Imagination

Quote from: tonygal on December 30, 2014, 06:36:02 AM

Too bad

0.385W/GH would have been really nice.

That will be the dream of course. The efficiency is directly correlated to voltage, however the stable setting is around 0.6V, below that you might experience stability issues

I'm using 80+ bronze PSUs, if you run a 90+ platinum PSU, the efficiency can increase a bit

tonygal

hero member

Activity: 560

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Too bad

0.385W/GH would have been really nice.

johnyj

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Beyond Imagination

Another observation: Too cold temperature will reduce the performance over time

For past several days, my outdoor temp dropped below -10c, and this affected the miner near the window, ASIC frequency keeps dropping over several days (together with the power usage), now I put in a slower GT1850 fan, and partly close the window to keep the intake temp around 10c degree, it has been stable at 970GH since then

Guy Corem

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Activity: 1414

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Spondoolies, Beam & DAGlabs

Quote from: johnyj on December 27, 2014, 03:40:06 AM

Quote from: Syke on December 26, 2014, 07:37:29 PM

Quote from: johnyj on December 26, 2014, 07:23:51 PM

A new record: Ambient temp 5c degree, 0.6/0.605 setting, 897GH, consumes 345W at wall, means 0.385W/GH efficiency

At very low temp, the normal 0.59/0.6V setting can not start all the loops, must raise it to 0.6/0.605V to get all the loops running, but the result is quite respectable

http://photo.mystisland.org/sp20/sp20_lowest.png

Impressive. Got a screenshot of the ASIC Status page?

But something is wrong here, with 345W, the webpage shows 897GH but mining pools shows constantly 700GH, I don't know if it is the latest firmware caused this problem, will restart it and try again

Edit: Something went wrong with previous settings, after several test, it seems 440W on wall for 930GH can be stable, still 0.47W/GH

0.47 J/GH is aligned with our undervolt results as well for 0.6V
There are differences between different batches of RockerBoxes, the last ones are more efficient.

johnyj

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Activity: 1988

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Beyond Imagination

Quote from: Syke on December 26, 2014, 07:37:29 PM

Quote from: johnyj on December 26, 2014, 07:23:51 PM

A new record: Ambient temp 5c degree, 0.6/0.605 setting, 897GH, consumes 345W at wall, means 0.385W/GH efficiency

At very low temp, the normal 0.59/0.6V setting can not start all the loops, must raise it to 0.6/0.605V to get all the loops running, but the result is quite respectable

http://photo.mystisland.org/sp20/sp20_lowest.png

Impressive. Got a screenshot of the ASIC Status page?

But something is wrong here, with 345W, the webpage shows 897GH but mining pools shows constantly 700GH, I don't know if it is the latest firmware caused this problem, will restart it and try again

Edit: Something went wrong with previous settings, after several test, it seems 440W on wall for 930GH can be stable, still 0.47W/GH

Guy Corem

donator

Activity: 1414

Merit: 1051

Spondoolies, Beam & DAGlabs

Quote from: Syke on December 26, 2014, 07:37:29 PM

Quote from: johnyj on December 26, 2014, 07:23:51 PM

A new record: Ambient temp 5c degree, 0.6/0.605 setting, 897GH, consumes 345W at wall, means 0.385W/GH efficiency

At very low temp, the normal 0.59/0.6V setting can not start all the loops, must raise it to 0.6/0.605V to get all the loops running, but the result is quite respectable

http://photo.mystisland.org/sp20/sp20_lowest.png

Impressive. Got a screenshot of the ASIC Status page?

Indeed, impressive.

Syke

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Activity: 3878

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Quote from: johnyj on December 26, 2014, 07:23:51 PM

A new record: Ambient temp 5c degree, 0.6/0.605 setting, 897GH, consumes 345W at wall, means 0.385W/GH efficiency

At very low temp, the normal 0.59/0.6V setting can not start all the loops, must raise it to 0.6/0.605V to get all the loops running, but the result is quite respectable

http://photo.mystisland.org/sp20/sp20_lowest.png

Impressive. Got a screenshot of the ASIC Status page?

johnyj

legendary

Activity: 1988

Merit: 1012

Beyond Imagination

A new record: Ambient temp 5c degree, 0.6/0.605 setting, 897GH, consumes 345W at wall, means 0.385W/GH efficiency

At very low temp, the normal 0.59/0.6V setting can not start all the loops, must raise it to 0.6/0.605V to get all the loops running, but the result is quite respectable

johnyj

legendary

Activity: 1988

Merit: 1012

Beyond Imagination

Turns out I still have to pay 60 euro for the import tax and some extra charge to DHL Undecided

The PWM adapter did not work at first, since the wire on the stock fan socket is different: The power on that socket is negative 12V. In order to run a PWM fan, you have to switch the position of the power and ground line on the fan connector, which makes the connector wiring color looks different than normal PWM connectors. This first photo shows the difference

The Everflow fan on this photo has 9 blades, but it is actually noisier than delta fan due to it is only 28mm in depth. With a delta AFC1212DE installed, at 20% speed, the DC temp never goes above 60c degree, which is my comfortable zone. The noise goes up to 54db at one meter distance, still acceptable, and a great improvement over stock fan's 68 db at 20% speed

raskul

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Activity: 434

Merit: 250

Quote from: Syke on December 23, 2014, 01:12:29 PM

Quote from: spiccioli on December 23, 2014, 12:26:53 PM

I would not leave such a powerfull fan open, it can seriously injure a finger.

While it could hurt, it is an exhaust fan. Far less dangerous than an intake fan.

beat me to it.. the blades point inwards... i'd still make sure it was away from anywhere that the cat could get nosey about it.

Syke

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Quote from: spiccioli on December 23, 2014, 12:26:53 PM

I would not leave such a powerfull fan open, it can seriously injure a finger.

While it could hurt, it is an exhaust fan. Far less dangerous than an intake fan.

spiccioli

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nec sine labore

Quote from: johnyj on December 23, 2014, 06:30:21 AM

While I don't feel any significant resistance if I hang a wire grill at the same place

I would not leave such a powerfull fan open, it can seriously injure a finger.

spiccioli

Biffa

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Quote from: johnyj on December 22, 2014, 11:56:45 PM

Grill down! Grin

I hung the cutted honey comb grill piece in front of the exhaust fan, and it is blown way by a quite large force, so remove it will improve the airflow for sure. And the hiss noise is gone

I can fit a fan wire grill to increase safety, but not a big deal, currently just leave it open (easy to clean the fan from dust Grin

)

I did think of that, it harks back to my watercooling days, but effect on resale value turned me off it.

johnyj

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Activity: 1988

Merit: 1012

Beyond Imagination

Quote from: raskul on December 23, 2014, 02:53:07 AM

Quote from: johnyj on December 22, 2014, 11:56:45 PM

Grill down! Grin

I hung the cutted honey comb grill piece in front of the exhaust fan, and it is blown way by a quite large force, so remove it will improve the airflow for sure. And the hiss noise is gone

http://photo.mystisland.org/sp20/sp20_26.jpg

I can fit a fan wire grill to increase safety, but not a big deal, currently just leave it open (easy to clean the fan from dust Grin

)

this is really interesting... does it improve the airflow at all? is there a way you can measure it?

There are reviews analyzed different types of grille and some of them said that a honey comb grill will give 10% less airflow. I can feel that honey comb grill obviously give resistance to air flow. While I don't feel any significant resistance if I hang a wire grill at the same place

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