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

[johnyj]

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

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[Guy Corem]

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]

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

[tonygal]

Too bad 0.385W/GH would have been really nice.

[johnyj]

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

[klondike_bar]

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

[Biodom]

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..

[ChineseSavior]

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

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

[Biodom]

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

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

order on ebay with free shipping...

[Guy Corem]

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

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

Order through RoadStress GB link.

[raskul]

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

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://bitcointalk.org/index.php?topic=903286.msg9924866#msg9924866

[bgibso01]

not long til it's over!
get in quick!
https://bitcointalk.org/index.php?topic=903286.msg9924866#msg9924866

Still waiting....   My first set is suppose to show up today.  Hope they give me enough time to test them and decide between the SP20 or S5.  The S5 units that I received run very stable at stock and rather impressive overclock. Sound is going to be the determining factor I think.

[klondike_bar]

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..

try running the stock fan at 5V - its actually a very manageable volume at that speed (~2200rpm approx) and is sufficienct to keep the unit around 60-65C at stock speeds. With some cold air at the intake I can keep under 62C at 375MHz

[klondike_bar]

not long til it's over!
get in quick!
https://bitcointalk.org/index.php?topic=903286.msg9924866#msg9924866

Still waiting....   My first set is suppose to show up today.  Hope they give me enough time to test them and decide between the SP20 or S5.  The S5 units that I received run very stable at stock and rather impressive overclock. Sound is going to be the determining factor I think.

I have a feeling the S5 will be a winner for 0.5w/GH efficiency and low noise (with 5V adapter for the fan or revised PWM controller settings), but the SP20 has a lot more flexibility to stack and be driven down to better efficiencies without needing a custom <11V PSU to do so.

[johnyj]

Another note: The voltage that supplied to the fan on SP20 control board is -11V, so the stock fan is already a bit slower than normal, but still as loud as vacuum cleaner at 20% speed, maybe 10% can work but I don't have time yet to do the ssh mod

[braindead]

What you guys think about this ones

http://www.arctic.ac/eu_en/products/cooling/case-fan.html

[johnyj]

Now quiet and stable: With GT1850 and cold air intake mod, 43db at 1 meter, ambient temp around 15c degree, 480W on wall with 80+ bronze PSU, extremely stable after 1 week of continuous running.



Very satisfied with this 1TH rig with such low noise level (you can not hear it in the next room with door opened)

[johnyj]

Bought this Fractal Design Newton R3 1000W 80+ platinum value PSU, suits SP20 perfectly



The platinum PSU draws 450W for 1TH, for 0.5W/GH, it can deliver 1.2TH at 600W (need more powerful fan on SP20 to keep it cool). Cheap 80+ platinum PSU is the way to efficiency

[johnyj]

What you guys think about this ones

http://www.arctic.ac/eu_en/products/cooling/case-fan.html

These fans are too weak to drive the SP20, actually most of the 120mm fans on PC store are low noise low rpm fans. 2500+ RPM and 100+ CFM PC fans are rare, most possibly you will need a 120x38mm 3000+ RPM fans to get a decent cooling on SP20 (if not aggresively underclocked) , but then noise will become a problem

[Guy Corem]

Bought this Fractal Design Newton R3 1000W 80+ platinum value PSU, suits SP20 perfectly



The platinum PSU draws 450W for 1TH, for 0.5W/GH, it can deliver 1.2TH at 600W (need more powerful fan on SP20 to keep it cool). Cheap 80+ platinum PSU is the way to efficiency

Nice. Cost?