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...
Topic: [Review] Spondoolies SP20 review - A Green miner with a Loud fan - page 3. (Read 20980 times)
January 08, 2015, 07:07:31 PM
operating three SP31 would be much easier...
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
PROCOMP 14" INCH ELECTRIC COOLING AUTOMOTIVE RADIATOR FAN 12 VOLT ($30 including shipping)
http://amzn.com/B003U7UR3A
January 07, 2015, 07:52:02 PM
I too think that running SP20 at its lowest settings might not be an optimal choice
Although the efficiency is impressive at 0.6V or less, it also reduce the hardware investment return. This is especially true when difficulty is starting to rise again. You race against the diminishing return of the mining rigs. After one year of operation, there will be future miners with newer process (16nm FinFet like knc claimed?) coming up, then all it matters are how much coins were digged out by then
I hope that SP20 can run at least 6 months before the next major technology advance wave hit the scene
Although the efficiency is impressive at 0.6V or less, it also reduce the hardware investment return. This is especially true when difficulty is starting to rise again. You race against the diminishing return of the mining rigs. After one year of operation, there will be future miners with newer process (16nm FinFet like knc claimed?) coming up, then all it matters are how much coins were digged out by then
I hope that SP20 can run at least 6 months before the next major technology advance wave hit the scene
January 07, 2015, 06:55:49 PM
Running the SP20s that slow is an expensive option.
January 07, 2015, 06:50:40 PM
Another possibility would be to use the EVGA SUPERNOVA 1600W Platinum and connect 3 - SP20 with a slight bump on the overclock up to 500W each.
30amp 240V PDU (7200W max capacity) ($150)
5 x EVGA Supernova 1600W Platinum w/ 14 PCI-E connectors ($1665)
15 x SP20 underclocked at 0.621V pulling 500W each ($7000) (15xMini-Farm) (~1TH per SP20 underclocked)
Run 3 SP20 on 1 1600W PSU using 1500W.
5 PSUs sucking 1500W each consumes 7500W total which puts 83% load on the breaker.
This would make a 15TH farm for $8815 running at 0.50W/GH efficiency for a total farm cost of $587/TH
EVGA Supernova 1600W @ $333
http://amzn.com/B00NJG61JQ
30amp 240V PDU (7200W max capacity) ($150)
5 x EVGA Supernova 1600W Platinum w/ 14 PCI-E connectors ($1665)
15 x SP20 underclocked at 0.621V pulling 500W each ($7000) (15xMini-Farm) (~1TH per SP20 underclocked)
Run 3 SP20 on 1 1600W PSU using 1500W.
5 PSUs sucking 1500W each consumes 7500W total which puts 83% load on the breaker.
This would make a 15TH farm for $8815 running at 0.50W/GH efficiency for a total farm cost of $587/TH
EVGA Supernova 1600W @ $333
http://amzn.com/B00NJG61JQ
January 07, 2015, 06:27:46 PM
I'm just curious what others think of this possible setup.
30amp 240V PDU (7200W max capacity) ($150)
4 x 1600W Rosewill 80 Silver w/ 16 PCI-E connectors ($1060)
16 x SP20 underclocked at 0.6V pulling 350W each ($7500) (15xMini-Farm + 1) (~800GH/s per underclocked SP20)
Run 4 SP20 on 1 1600W PSU using 1400W.
4 PSUs sucking 1400W each consumes 5600W total which puts only 77% load on the breaker.
Primary question is do you think 4 underclocked SP20s (350W ea.) running off 16 x PCI-E connectors on 1 PSU is too much for a PSU?
This would make a 12.8TH farm for $8710 w/ 0.47W/GH efficiency w/ a cost of $680/TH.
The PSU is the Rosewill HERCULES-1600 1600W 80 PLUS SILVER http://amzn.com/B00A940V1K
30amp 240V PDU (7200W max capacity) ($150)
4 x 1600W Rosewill 80 Silver w/ 16 PCI-E connectors ($1060)
16 x SP20 underclocked at 0.6V pulling 350W each ($7500) (15xMini-Farm + 1) (~800GH/s per underclocked SP20)
Run 4 SP20 on 1 1600W PSU using 1400W.
4 PSUs sucking 1400W each consumes 5600W total which puts only 77% load on the breaker.
Primary question is do you think 4 underclocked SP20s (350W ea.) running off 16 x PCI-E connectors on 1 PSU is too much for a PSU?
This would make a 12.8TH farm for $8710 w/ 0.47W/GH efficiency w/ a cost of $680/TH.
The PSU is the Rosewill HERCULES-1600 1600W 80 PLUS SILVER http://amzn.com/B00A940V1K
January 07, 2015, 11:52:57 AM
Ok, so i decided to underclock some more. It appears that my newest SP20 underclocks and performs much better than my 1 month old SP20. I've now got my newest SP20 running a 0.597V and it shows a total of 353W on the stats, hashing at 819GH/s. My older SP20 is running at .610V (about as low as it will go) for 402W on the stats, hashing at 862GH/s. I've got both on the 1300W 80 Plus Gold Rosewill and its only pulling 781 Watts at the wall via a Kill-a-watt meter! That 1681GH/s @ 781 W for 0.464 W/GH. I'm not sure how accurate the stats page wattage is, but if its correct that means my PSU is running at 96.6% efficiency. 755W showing on stats combined and 781W at the wall.. 755/781=96.6%. Is this right?
New SP20 353W .597V 819GH ~0.44W/GH
Old SP20 402W .610V 862GH ~0.48W/GH
Combined @ Wall 781W 1681GH = 0.464W/GH
These 2 are running stacked @ 20C room temp.
New SP20 353W .597V 819GH ~0.44W/GH
Old SP20 402W .610V 862GH ~0.48W/GH
Combined @ Wall 781W 1681GH = 0.464W/GH
These 2 are running stacked @ 20C room temp.
That's some really impressive numbers!
January 06, 2015, 06:35:44 PM
Ok, so i decided to underclock some more. It appears that my newest SP20 underclocks and performs much better than my 1 month old SP20. I've now got my newest SP20 running a 0.597V and it shows a total of 353W on the stats, hashing at 819GH/s. My older SP20 is running at .610V (about as low as it will go) for 402W on the stats, hashing at 862GH/s. I've got both on the 1300W 80 Plus Gold Rosewill and its only pulling 781 Watts at the wall via a Kill-a-watt meter! That 1681GH/s @ 781 W for 0.464 W/GH. I'm not sure how accurate the stats page wattage is, but if its correct that means my PSU is running at 96.6% efficiency. 755W showing on stats combined and 781W at the wall.. 755/781=96.6%. Is this right?
New SP20 353W .597V 819GH ~0.44W/GH
Old SP20 402W .610V 862GH ~0.48W/GH
Combined @ Wall 781W 1681GH = 0.464W/GH
These 2 are running stacked @ 20C room temp.
New SP20 353W .597V 819GH ~0.44W/GH
Old SP20 402W .610V 862GH ~0.48W/GH
Combined @ Wall 781W 1681GH = 0.464W/GH
These 2 are running stacked @ 20C room temp.
January 06, 2015, 05:55:49 PM
I'm running 2 underclocked SP20's on a Rosewill LIGHTNING 1300W 80 PLUS GOLD and I'm very impressed with the build quality. The modular cables screw on and there are a total of 8 6-pin PCI-Express connectors. I got mine at Newegg for $179.99, free shipping and a $20 rebate card. I can attest that this PSU really can run at 92% efficiency. If I go off what the SP20's say they are pulling and the power at the wall its running just shy of 93% at about an 85% load.
For those that are wondering I have a single 6-pin cable each on the top connections of each board and both lower connections share a double PCI express cable. So 6 cables total (2 doubles).
Here are some specs of the PSU
100-240V
80 PLUS Gold Certified
Modular Design
Efficiency up to 92%
140mm Silent LED Fan
Here are some stats of my 2 SP20s vs an Antminer S4.
WattsAtWall GH/s W/GH
1450 2000 0.725
1130 2159 0.523
For those that are wondering I have a single 6-pin cable each on the top connections of each board and both lower connections share a double PCI express cable. So 6 cables total (2 doubles).
Here are some specs of the PSU
100-240V
80 PLUS Gold Certified
Modular Design
Efficiency up to 92%
140mm Silent LED Fan
Here are some stats of my 2 SP20s vs an Antminer S4.
WattsAtWall GH/s W/GH
1450 2000 0.725
1130 2159 0.523
January 06, 2015, 04:57:12 PM
Nice. Cost?
This PSU is cheap because its fan is noisy (no PWM control, it does not run under light load, but spins up to top speed when the board is overheat). But for mining its noise is neglectable, so a perfect choice, you can find it for 200$ on Amazon
January 06, 2015, 03:35:59 AM
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?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
~230chf here in CH. https://www.digitec.ch/en/s1/product/fractal-newton-r3-1000w-power-supply-computer-631365?tagIds=76-524
January 06, 2015, 12:35:06 AM
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? 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
January 05, 2015, 09:25:23 PM
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
January 05, 2015, 07:16:41 PM
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
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
January 05, 2015, 09:28:54 AM
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)
Very satisfied with this 1TH rig with such low noise level (you can not hear it in the next room with door opened)
January 02, 2015, 11:21:57 AM
December 31, 2014, 09:16:54 PM
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
December 31, 2014, 11:48:28 AM
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.
December 31, 2014, 11:45:17 AM
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
December 31, 2014, 11:06:21 AM
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. Jump to: