[CLOSED] SP20 - most efficient miner - ~0.5W/GH - 2 units min!

[Swimmer63]

Thanks for the GB Roadstress.  I had held off buying SP equipment because of the combined equipment and delivery cost.  But this deal makes it all worth it and is the best available from any manufacturer right now.  Bought 3.  My only regret is I have to ship them right to my out of state hosting location.  Can't deal with the sound in the office.
Thank you SP for a deal that makes sense!

[bgibso01]

Thanks again for the GB.  Just grabbed another 4 units.  Not sure where I'll stick them yet, but these last few days have shown me that these are quality units and the SP-T support folks really put forth an effort to help.

Quick question:  When the ASIC tab shows its using 890 watts, do I need to divide that by .8 to get an approximation at the wall assuming 80% efficient PSU? 

I don't know how it's doing it, but at stock with 2 Corsair HX850, one unit is running 1683 @ 890w.  Seems pretty good to me and close enough to 1.7T.

[Biffa]

Thanks again for the GB.  Just grabbed another 4 units.  Not sure where I'll stick them yet, but these last few days have shown me that these are quality units and the SP-T support folks really put forth an effort to help.

Quick question:  When the ASIC tab shows its using 890 watts, do I need to divide that by .8 to get an approximation at the wall assuming 80% efficient PSU?  

I don't know how it's doing it, but at stock with 2 Corsair HX850, one unit is running 1683 @ 890w.  Seems pretty good to me and close enough to 1.7T.

No the PSU is only delivering 80% of what its pulling from the wall to give you 890Watts, its closer to 1120W at the wall

[bgibso01]

Thanks again for the GB.  Just grabbed another 4 units.  Not sure where I'll stick them yet, but these last few days have shown me that these are quality units and the SP-T support folks really put forth an effort to help.

Quick question:  When the ASIC tab shows its using 890 watts, do I need to divide that by .8 to get an approximation at the wall assuming 80% efficient PSU?  

I don't know how it's doing it, but at stock with 2 Corsair HX850, one unit is running 1683 @ 890w.  Seems pretty good to me and close enough to 1.7T.

No the PSU is only delivering 80% of what its pulling from the wall to give you 890Watts, its closer to 1120W at the wall

K, I figured I needed to to divide by .8 to get the wall pull.  Just wanted to make sure.

[TracerX]

I paid on 12/18 and my units were shipped on 12/23. They spent some time with customs in Tel Aviv, then customs in Cincinatti. They made it to Dallas Monday, but my delivery driver decided to take them off the truck and delay delivery for Tuesday. Someone else at the distribution hub then accidentally sent them back to Cincinnati, where they sit on hold right now. Due to the holidays, I don't expect to receive anything until next week. DHL has done this to me before and I have lost confidence in their US operations.

Mine are also apparently stuck in customs in Cincinnati.  I suppose there is nothing we can do about it but wait.

[raskul]

Thanks again for the GB.  Just grabbed another 4 units.  Not sure where I'll stick them yet, but these last few days have shown me that these are quality units and the SP-T support folks really put forth an effort to help.

Quick question:  When the ASIC tab shows its using 890 watts, do I need to divide that by .8 to get an approximation at the wall assuming 80% efficient PSU?  

I don't know how it's doing it, but at stock with 2 Corsair HX850, one unit is running 1683 @ 890w.  Seems pretty good to me and close enough to 1.7T.

No the PSU is only delivering 80% of what its pulling from the wall to give you 890Watts, its closer to 1120W at the wall

K, I figured I needed to to divide by .8 to get the wall pull.  Just wanted to make sure.

divide by 0.92 to get a more accurate at-the-wall

[bgibso01]

I noticed SP-T lowered the price of the 15 & 3 pack to less than the GB.  Can I get a little love thrown back my way since my order for 4 hasn't been filled yet?  

[mike9]

Thanks again for the GB.  Just grabbed another 4 units.  Not sure where I'll stick them yet, but these last few days have shown me that these are quality units and the SP-T support folks really put forth an effort to help.

Quick question:  When the ASIC tab shows its using 890 watts, do I need to divide that by .8 to get an approximation at the wall assuming 80% efficient PSU?  

I don't know how it's doing it, but at stock with 2 Corsair HX850, one unit is running 1683 @ 890w.  Seems pretty good to me and close enough to 1.7T.

No the PSU is only delivering 80% of what its pulling from the wall to give you 890Watts, its closer to 1120W at the wall

K, I figured I needed to to divide by .8 to get the wall pull.  Just wanted to make sure.

divide by 0.92 to get a more accurate at-the-wall

I haven't found the ~0.9 divisor to be accurate.  I used 0.9 to estimate running two SP20's off one EVGA 1600 G2.  The ASIC Stats page showed ~620W each—and they ran, though one took a few tries to boot.  Then I bought a Kill-A-Watt - and what I calculated (1240/0.9) to be 1378 at the wall, actually measured 1620 (120V).  I now run 3 SP20's off of two 1600's and like the increased headroom, but have since been pairing new SP20's with 1300W G2's, which I find the best bang for the buck.

[RoadStress]

Last day! Hop in.

[padrino]

Thanks again for the GB.  Just grabbed another 4 units.  Not sure where I'll stick them yet, but these last few days have shown me that these are quality units and the SP-T support folks really put forth an effort to help.

Quick question:  When the ASIC tab shows its using 890 watts, do I need to divide that by .8 to get an approximation at the wall assuming 80% efficient PSU?  

I don't know how it's doing it, but at stock with 2 Corsair HX850, one unit is running 1683 @ 890w.  Seems pretty good to me and close enough to 1.7T.

No the PSU is only delivering 80% of what its pulling from the wall to give you 890Watts, its closer to 1120W at the wall

K, I figured I needed to to divide by .8 to get the wall pull.  Just wanted to make sure.

divide by 0.92 to get a more accurate at-the-wall

To get an accurate estimate you need to look at the loading estimate for the PSU, off of 120V on a higher load the efficiency will fade fast... I outfitted my house with some 240V circuits last year and run all of my PSUs off of those circuits, nets me over 10% in power savings..

I haven't found the ~0.9 divisor to be accurate.  I used 0.9 to estimate running two SP20's off one EVGA 1600 G2.  The ASIC Stats page showed ~620W each—and they ran, though one took a few tries to boot.  Then I bought a Kill-A-Watt - and what I calculated (1240/0.9) to be 1378 at the wall, actually measured 1620 (120V).  I now run 3 SP20's off of two 1600's and like the increased headroom, but have since been pairing new SP20's with 1300W G2's, which I find the best bang for the buck.

[digitizing]

How to buy this groupbouy ?
should I request to OP or just buy
from this link http://www.spondoolies-tech.com/products/roadstresss-sp20-special-holiday-gb ?

[bgibso01]

How to buy this groupbouy ?
should I request to OP or just buy
from this link http://www.spondoolies-tech.com/products/roadstresss-sp20-special-holiday-gb ?

Read the OP instructions and use the link.

[mike9]

Thanks again for the GB.  Just grabbed another 4 units.  Not sure where I'll stick them yet, but these last few days have shown me that these are quality units and the SP-T support folks really put forth an effort to help.

Quick question:  When the ASIC tab shows its using 890 watts, do I need to divide that by .8 to get an approximation at the wall assuming 80% efficient PSU?  

I don't know how it's doing it, but at stock with 2 Corsair HX850, one unit is running 1683 @ 890w.  Seems pretty good to me and close enough to 1.7T.

No the PSU is only delivering 80% of what its pulling from the wall to give you 890Watts, its closer to 1120W at the wall

K, I figured I needed to to divide by .8 to get the wall pull.  Just wanted to make sure.

divide by 0.92 to get a more accurate at-the-wall

I haven't found the ~0.9 divisor to be accurate.  I used 0.9 to estimate running two SP20's off one EVGA 1600 G2.  The ASIC Stats page showed ~620W each—and they ran, though one took a few tries to boot.  Then I bought a Kill-A-Watt - and what I calculated (1240/0.9) to be 1378 at the wall, actually measured 1620 (120V).  I now run 3 SP20's off of two 1600's and like the increased headroom, but have since been pairing new SP20's with 1300W G2's, which I find the best bang for the buck.

To get an accurate estimate you need to look at the loading estimate for the PSU, off of 120V on a higher load the efficiency will fade fast... I outfitted my house with some 240V circuits last year and run all of my PSUs off of those circuits, nets me over 10% in power savings..

Ah, so I might have had that 0.9 'efficiency' powering only one unit, but I lost efficiency as the load increased with the second SP20 - netting me closer to the rated 0.8?  Got it, good to know, thank you!

[MrTeal]

Thanks again for the GB.  Just grabbed another 4 units.  Not sure where I'll stick them yet, but these last few days have shown me that these are quality units and the SP-T support folks really put forth an effort to help.

Quick question:  When the ASIC tab shows its using 890 watts, do I need to divide that by .8 to get an approximation at the wall assuming 80% efficient PSU?  

I don't know how it's doing it, but at stock with 2 Corsair HX850, one unit is running 1683 @ 890w.  Seems pretty good to me and close enough to 1.7T.

No the PSU is only delivering 80% of what its pulling from the wall to give you 890Watts, its closer to 1120W at the wall

K, I figured I needed to to divide by .8 to get the wall pull.  Just wanted to make sure.

divide by 0.92 to get a more accurate at-the-wall

I haven't found the ~0.9 divisor to be accurate.  I used 0.9 to estimate running two SP20's off one EVGA 1600 G2.  The ASIC Stats page showed ~620W each—and they ran, though one took a few tries to boot.  Then I bought a Kill-A-Watt - and what I calculated (1240/0.9) to be 1378 at the wall, actually measured 1620 (120V).  I now run 3 SP20's off of two 1600's and like the increased headroom, but have since been pairing new SP20's with 1300W G2's, which I find the best bang for the buck.

To get an accurate estimate you need to look at the loading estimate for the PSU, off of 120V on a higher load the efficiency will fade fast... I outfitted my house with some 240V circuits last year and run all of my PSUs off of those circuits, nets me over 10% in power savings..

Ah, so I might have had that 0.9 'efficiency' powering only one unit, but I lost efficiency as the load increased with the second SP20 - netting me closer to the rated 0.8?  Got it, good to know, thank you!

No good PSU should drop down to 80% at full load. For something like the EVGA 1300W PSU, tests show it getting ~91% at 50% load and 87.5% at full load. 3.5 percentage points is still a decent drop, but nothing like 10%.

[mike9]

...

divide by 0.92 to get a more accurate at-the-wall

I haven't found the ~0.9 divisor to be accurate.  I used 0.9 to estimate running two SP20's off one EVGA 1600 G2.  The ASIC Stats page showed ~620W each—and they ran, though one took a few tries to boot.  Then I bought a Kill-A-Watt - and what I calculated (1240/0.9) to be 1378 at the wall, actually measured 1620 (120V).  I now run 3 SP20's off of two 1600's and like the increased headroom, but have since been pairing new SP20's with 1300W G2's, which I find the best bang for the buck.

To get an accurate estimate you need to look at the loading estimate for the PSU, off of 120V on a higher load the efficiency will fade fast... I outfitted my house with some 240V circuits last year and run all of my PSUs off of those circuits, nets me over 10% in power savings..

Ah, so I might have had that 0.9 'efficiency' powering only one unit, but I lost efficiency as the load increased with the second SP20 - netting me closer to the rated 0.8?  Got it, good to know, thank you!

No good PSU should drop down to 80% at full load. For something like the EVGA 1300W PSU, tests show it getting ~91% at 50% load and 87.5% at full load. 3.5 percentage points is still a decent drop, but nothing like 10%.

You're right, I looked up the 80 Plus spec, 80 Plus Gold is 90% @ 50% load, and 87% @ 100% on 115V.  So the difference in wattage reported on the ASIC Stats page versus ATW is not PSU, or not solely, but a mix of PSU and miner 'other'?  I'll have to do some more kill-a-watt testing...

[Biffa]

How to buy this groupbouy ?
should I request to OP or just buy
from this link http://www.spondoolies-tech.com/products/roadstresss-sp20-special-holiday-gb ?

Group buy finished now.

You can buy individually @ $595 + delivery or you can buy a pack of 3 @ $498 ea + free delivery.

[RoadStress]

Group buy finished now.

You can buy individually @ $595 + delivery or you can buy a pack of 3 @ $498 ea + free delivery.

Group Buy is CLOSED! Thank you everyone!

[TracerX]

Group buy finished now.

You can buy individually @ $595 + delivery or you can buy a pack of 3 @ $498 ea + free delivery.

Group Buy is CLOSED! Thank you everyone!

Thank you!

[RoadStress]

Ok so there are 2.94 BTC to be donated. I was thinking of donating them like this:
- 1 BTC to the /r/millionairemakers winner (see: www.reddit.com/r/millionairemakers/comments/2q9ung/santa_is_real_thank_you_all_so_much_i_am_still_in/) ;
- 1 BTC to Hal Finney Bitcoin Fund for ALS Research (see: http://blog.bitcoinfoundation.org/join-teamhal-give100-wbitcoin-to-the-hal-finney-bitcoin-fund-for-als-research/) ;
- 0.5 BTC to ckolivas for cgminer and ckpool;
- 0.5 BTC to Armory.

Any complains/suggestions? 24 hours max.

[windpath]

Ok so there are 2.94 BTC to be donated. I was thinking of donating them like this:
- 1 BTC to the /r/millionairemakers winner (see: www.reddit.com/r/millionairemakers/comments/2q9ung/santa_is_real_thank_you_all_so_much_i_am_still_in/);
- 1 BTC to Hal Finney Bitcoin Fund for ALS Research (see: http://blog.bitcoinfoundation.org/join-teamhal-give100-wbitcoin-to-the-hal-finney-bitcoin-fund-for-als-research/);
- 0.5 BTC to ckolivas for cgminer and ckpool;
- 0.5 BTC to Armory.

Any complains/suggestions? 24 hours max.

I like it.