Topic: Unofficial Spondoolies SP20 thread - page 60. (Read 126168 times)

BTW got a couple of new fans to test

well I was not able to get stable numbers for 2 on an evga 1300 g2.  I suspect it can be done with a 220 volt setup but that it is just short of stable. Most likely some will get a better pair of sp20's and get an evga 1300 g2 to run 2.

What I like is  you can run 2 on a pair of 850 watt psu's an the same 15 amp 120 volt circuit. each doing 720 watts and 1280gh

This is easy If you have only the 2 sp20's + 850 watt psu's  you can do 1440 watts and 2560gh!  you will be within the safety margin of a 15 amp 120 volt circuit.

This bumps up what an in home miner in the USA can do.  I have a 150amp box with room for 40 circuits.

 If I want to I could do 10 sp20's  on just 5x 15 amp circuits .  this is nice really nice. 

I have 6 circuits mining right now> I can spare a few more.
Pretty sure I am going to sell off my s-3's and go all sp20s.

That's astounding.  That means you can run two with a gold/plat 1300 or higher!

It also means I can safely put it on my 850w PSU.

M

Going to do my last psu test on the low end.  I will test a seasonic 760 watt platinum psu today.
early tests are good so far!


  So to try to get low watts to be safe for the seasonic 760 plat I clocked lower  I get 1189 gh this is using 631 watts at the kwatt meter . this comes to an amazing  0.5306 watts per gh!  at the kwatt meter



see below :



here is the setting page:





the asic stats all freq are under thus yellow.  once you are at this point it is really hard to go any lower and restarts may need to use a higher number as they are difficult

well if you want to under clock they are easy.

Overclock is harder a pair of cx750's will give you enough power to max your unit's hash power.

Fan at 90 is loud,  and you need a cold room.  you will use 1200-1300 watts to do 1650-1750

I finally got one of these SP20's ordered up! I hope it lives up to Philip's praises  I was hoping that I had a single PSU to run it, but now I am not so sure? I have several LEPA 1600's sitting around and some Corsair 1200AXi's. I suppose maybe dual CX750's would do the trick.

over night results on the sp20 and the seasonic 860 plat are good.

  I got it down to 724 watts and 1289 gh make it 718 - 724 watts






my power panel is right under that wood

I will test my seasonic 760 wat plat today

yes most

likely  you can set it for a 750 watt psu and each sp20 machine varies like the gpus used to vary.  some over volt better some under volt better.

my stable low has been 625 watts for 1 unit and 1340 watts  for 2 units most likely due to using a 120 volt circuit for the evga 1600 p2 running the second sp20 is more watt costly.  I did get 1277 for the two but could not repeat that.

 I can do 625 watts for one  over and over.
I found you have to set the watt limits to 150 and if you set it to 4 x 150 it under volts better.


okay  I just hooked up 1 sp20 to a seasonic 850 watt plat psu.   going to test for a day. all of these are under 1 hour of testing.


then I will test a seasonic plat 760 watt psu.

right now the kwatt meter reads 803 watts. make it 797. I clocked to be under the 850




I am doing about 1360 gh



settings for the 1 sp20 on the seasonic 850 watt



asic temps look decent

1. see comment above. I assume that once I setup down-clocking SP20 (720W, 1350  GH) using EVGA 1300, I would be able to run them with 750W Corsair, right?
People were running two S3 overclocked with one corsair 750 (it should be able to provide for up to 800W). Or it is too risky?
2. are you on 110/120V or 220/240V? again, you probably mentioned it somehwere already.

thanks

Yes ... please post your settings and PSU(s) used ... sounds good.

pictures / screen grab, or it didn't happen.

I have one SP20 running at 597 Watts on the wall at 1160 gh/s.

I run 1 sp20 and 1 s-3 with each of my  2  evga 1300's

first setup gets 1325 for the sp20 and 490 for the s-3     1815gh at about 1215 watts.

second setup gets 1333 for the sp20 and 485 for the s-3 1818gh at about 1234 watts.

the key to the sp20 is this if you have some evga 1300 and some s-3   you can do 1+1 and get 1815 gh at 1215 watts.


if you want to run the sp20 only on the evga 1300 and push it you will get 1600gh to 1680gh  and use the same 1200 watts.  going to 1700 and staying at that is very hard to do.

So I guess you need to look at what you have on hand.

I had evga 1300's I had s-3's   so the upgrade path was easy ..  I run 5 s-3s and 5 sp20's  

I sold off some of my s-3's to make the room for the sp20's

I've been going back and forth on whether to order these or the antminer s4.. My main concern has been the power supplies.. I have a couple of evga 1300 g2's..  I'm assuming you can run one of the sp20s on one 1300, but what kind of speed do you get and will the cabling on the g2's handle the constant load.. Im running 240v.

that method described works. but you have to remember that the psu.  seasonic  1000 watt.   can only do 225 for each pcie. well maybe 250.

setting 288 for the unit's pcie may hurt the psu if you type in a higher voltage by accident.

that method is simple and if your psu has tons of power you won't hurt the psu.

if you have a weaker psu you can have issues.


also when you use .64 as the starting volts the machine may not fire up.
 these machines remind me of gpus  the best settings vary from machine to machine.

after staying up for hours.  I have stopped my underclock testing .  I can go no lower then 1350 watts and be stable on the restarts.

so 2 sp's will run easy on the evga 1600p2

they will not run safely on the evga 1300 g2

but if you have a decent server psu you can do 2 of these. any good  1600 watt psu can do 2 at about 1350 watts at the kwatt meter and 2450 gh.

if you clock lower it gets very hard to do restarts. good news is 2 on a 15 amp 120 circuit .  also a good 750 watt psu can run one.  I have a seasonic 760 watt plat

and I have a seasonic 850 watt plat.  I will test them over the next few days.

How to underclock SP2x/3x  By Zvisha Shteingart   10 December, 2014

yeah but that low is tricky  ..


730 watts and 1300gh is easy  so your gold 1000 watt seasonic can do it .  let me know when you get it I will do test settings for you to try.


the setting in bold should keep you safe with the seasonic 1000 watt psu

Set your fans to 80 unless you are in very cold place or in economy mode
Fan Speed -------------------------------------------------------------------------------------------------------50

Set your starting voltage no more then 10 mv under your stable working voltage (from ASIC stats page)
Start Volts Unit 1(0.64-0.80)    -------------------------------------------------------------------------------------------------0.659

Start Volts Unit 2(0.64-0.80) ---------------------------------------------------------------------------------------------------0.659

Start Volts Unit 3(0.58-0.80) ---------------------------------------------------------------------------------------------------0.657

Start Volts Unit 4(0.58-0.80) ---------------------------------------------------------------------------------------------------0.657

Set your Maximum voltage to 0.790 for maximum mining or less for economy mode
Maximum Voltage (0.580-0.790) ---------------------------------------------------------------------------------------------- 0.661

Set PSU power to 120 and let the system learn the actual PSU limit.
Max PSU Power Unit 1 (70W - 288W) -----------------------------------------------------------------------------------------180

Max PSU Power Unit 2 (70W - 288W)-----------------------------------------------------------------------------------------180

Max PSU Power Unit 3 (70W - 288W)----------------------------------------------------------------------------------------180

Max PSU Power Unit 4 (70W - 288W)-----------------------------------------------------------------------------------------180

Heya all, I'm getting one of these units, soon, maybe.

philipma195, are you saying you ran two of them as low as 1266 watts? Therefore, each single unit can run at 633 watts? (Which means, I can use a single PSU, I still have a 1000 watt gold rated seasonic and corsair, which is not selling for some reason, so I might as well use it.)

Thank you for this tip, really appreciate the advice, Im used to overclocking GPU/CPUs and some of the bitmain machines, but this is my first set of SP20s, and so far im very happy with the quality, and im saving up for the SP35.

I have put my current stats below, so far all looks good to me, this is a snapshot of one of my machines at stock.

http://i58.tinypic.com/90ocg0.png

yes if you go too high for temps you get yellow

if you go too low for freq you get yellow.

now i really hope this is not a problem as two sp20's are on the one evga 1600 p2  at 1266 watts.  It is an easy fix to go up to 1350 watts as the evga 1600 p2 and my 15 amp usa power circuit can do 1440 watts 24/7/365

but if it is a problem my hope to run 2 on an evga 1300 g2 will be done.  I am going to proceed slowly with the next test.