no above 1650 is redlining the miners.  and it burns a ton of power.  efficiency drops like a rock.  If you have them in a good room and you have cheap power

run around 1500gh  check power draw. then try 1550gh check power draw. then try 1600gh check power draw.  decide if adding 50 or 100gh is wroth the extra watts.

Hint it really is not for almost all of us.

 I agree with you the review got too long and has more then 25 pages of info.
 I am going to lock it over the weekend.
 Frankly I am still not happy with any set of fans I have used.

these come on monday I suspect they will be the best fix.

http://www.ebay.com/itm/191443200211?

It improves slightly, and  it does not like a 35c room it does a little worse.

It will work fine.    do you realize the sp20 works far better at 1200gh to 1400gh hash rates?

If you run at 1350gh it costs 750 to 800 watts

If you run at 1650gh it costs 1200 to 1225 watts

Even if you are a free power guy.  try running them at 1400 to 1500gh  as  the 1650 to 1700gh speeds are redline speeds.

 I run 8 of them in my home all around 1200gh. They use under 600 watts at this speed.

that unit above can not do what I wrote below.. you need to repair it.  btw it was most likely melted by using the 2 head pcie cable incorrectly. thus pulling too much power from that plug.

on the s-5 if you plug the two heads on the double cable into one board.  a board pulls 300 watts.  and you melt the plug.



okay I am a bit buzzed but here goes

the s-5 has a pair of pcie jacks. on the left board

it has a pair of pcie jacks on the right board

at freq  350 the unit pulls 600 watts.

each board pulls 300 watts

(shame shame shame on you for bringing up anything but pcie cables> buzzed humor at its worst)

so take 1 pcie cable  color red plug it into a red pcie jack on the evga plug it into the left board. (use a single red pcie cable)

so take 1 pcie cable color red plug it into a red pcie jack on the evga plug it into the right board (use a single plug pcie cable)

now take  a double  plug pcie cable.  plug the single end into the psu. then plug the double plug into the left and right boards of the s-5

so three cables plug into the psu pcie jacks and  feed into the s-5.  if you do it the way I say the s-5's power is divided to the  three cables equally.  since 1 s-5 pulls 600 watts each cable is doing 200 watts.

run the 1 s-5 at stock 350 freq feel the cables a few times all should be okay since the cable are load balanced correctly.

then do the other 3 cable the same wat to the s-5.  the evga 1300 g2 will be doing about 1215 watts at a kwatt meter.  and each cable will pull about 200 watts.

I am a bit buzzed so test this very carefully . and check it every hour or so  for the first 6 hours at least.

amen to under 10+.. 

yeah if you use the stock fan as a push and add a loud fast  pull fan you can do  387 to 406. staying close to 60c in a cool room

 Insanely loud close to 78db.

 which means testing overclocks  while the wife takes a shower so I don't have her complain about the noise.

If you have a cold place and loudness is not an issue the stock will run close to 4000rpm add a fast delta as a pull and good over clocks will work.

I used the stock to push running at 4000 rpm the 3 pin 148 cfm delta to pull at 3000 rpm.  this setup could do 406 freq in a fairly cool room.  If you had a cold room I think the unit could clock to 412-425.

mine has been stable with fan mods and underclock to 325. in a fairly cool room.

http://www.directron.com/zmmc1.html?gsear=1  connect this to your psu  then connect it to your fans it should run the fans at 5 voltt


more info here

https://bitcointalk.org/index.php?topic=907219.msg10004920#msg10004920

yeah that looks good and may be best  solution.

yeah but look here

http://www.bitcoincharts.com/ 

they have  a   4.52% jump   so 6 or 7 is in the middle.  I would love to see a solid drop in price to 175usd  this would scare the shit out of the big miners the dc's even make knc and bitfury sweat.


Blocks   337001
Total BTC   13.675M
 
Difficulty   40640955017
Estimated   42478493256 in 1687 blks
 
Network total   321462.682 Thash/s
Blocks/hour   6.63 / 543 s

the melt was on the sp20 end?

I sometimes see my last loops run higher watts.  your last loop burned?

let me show an example of what I mean  the last loop pulls 165 or so the first 3 pull 135 or so.  I get 1180gh but the high last loop does show on most of my 8 sp20's




does it here also

 I am going to lock this thread and lock my sp20 review thread maybe on monday.

I am going to sell this to a forum member that lives a few miles from me along with a sp20.

I am done testing it and will give it to him with the stock fan on the side.

  I will install my delta 3 pin and run that .  it is louder then the noctua - silverstone in use, but it cools better.

I have the 4 pin deltas coming to my house  on monday.

  I will give him a pair and ask him to test them.

I would buy these if I needed miners. (I have 8 sp20's)

I may buy 2 of these in a bit if the price drops.

My home is suited to run 7 to 9 sp20's and 1-3 s-5's.

  If you are an established miner that has used s-1's or s-3's and you want to upgrade I suggest  
2 s-5's and 2 sp20's.  I think that would be 900 for a pair of s-5's shipped to the usa and 1020 for a pair of sp20's shipped to the usa.  

  To bitmaintech thank you for the miner  and it was a pretty good miner,  but better fans would have been smarter for you to do.

532 watts 1073 gh  = .496 per gh

clock at 325
push noctua 2640 rpm  pull silverstone  1800 rpm.--quiet

 a little bit warm.
hw's good

the s-3 fans are quiet compared to the stock s-1 or the stock s-5

just downclock the  s-3 to hash at 425gh and they work fine.  I have 2 in my friends office batch 1 been running them since july 22 2014.

If you want to complain about s-3's you can  but they are way better then the s-5

your cable on the psu may be bad

your psu can't provide all the power needed to mine.

it looks like you have 3 good cables doing 315gh each

1 cable with no power doing zip.

your watt settings are 215 a  board   what psu do you use?

check cables.

try clocking lower if cables are good.

yeah and if you can run 250 th at 6 cents a kwatt it could make sense to buy them.  they do .8 watts  a gh or 800 watts a th

so 250 x 800 = 200kwatts

cost for them is about 65000 add psu's building etc 20000 = 85000

and after 1 year the 85000 = 92000 you make 7 k  

yeah links for you corsair rm850


http://www.amazon.com/Corsair-Series-80PLUS-Gold-Certified-Supply/dp/B00EB7UIXM/ref=sr_1_1?ie=UTF8&qid=1420122994&sr=8-1&keywords=corsair++850


antec

http://www.amazon.com/Antec-Current-ATX12V-850-HCG-M/dp/B00BT6O2TY/ref=sr_1_sc_1?ie=UTF8&qid=1420123089&sr=8-1-spell&keywords=anterc++850


evga 1300 g2 - will do 2 and the seller on amazon is very good price. 


http://www.amazon.com/gp/offer-listing/B00COIZTZM/ref=sr_1_1_olp?s=pc&ie=UTF8&qid=1420123232&sr=1-1&keywords=evga+1300+g2&condition=new

How about you save power because you just run a miner and don't run a server for the blockchain as a very important benefit?

I point a sp20 here. No muss no fuss.  I would need to run a server 24/7/365 with a decent net connection certainly costs more for me if I solo mine at home using a  PC to run the blockchain.


@ Ck what type of server can be used?  What does it cost to build?  I know that running a weak pc won't cut it.  Not sure how good the physical  server needs to be.

usa ebay would allow you to buy the s-3 for 150 usd - 180 usd



http://www.ebay.com/sch/i.html?_from=R40&_sacat=0&LH_BIN=1&_sop=15&_mPrRngCbx=1&_udlo=140&_udhi=180&_nkw=antminer%20s-3&_dcat=179171&rt=nc&_pppn=r1


if you have cheap power 10 cents or less they may work for you

 

yeah it will be a guessing game to get the correct   fan/price/sound/cfm   frankly bitmain had them before us and could have done some more sound tests.  the stock fan has no marks.  it moves a ton of air (150 cfm or more)    but runs at 3600 to 3800 rpm.  it is fine in a garage not attached. or I guess use a speed controller on it.

 push noctua is 2700 rpm pull silverstone is 1900 rpm -  not quite cool as I would like. considering I am letting outside air at -5c into the room via the window,  but 381 freq is giving 1250 gh at 621 watts plus powering the 2 fans. Sound is really good. cost is too high 24 + 16 = 40 and it went up  to 24+20 = 44

HW's are decent.  Would I run this setup 24/7/365  yeah if I was running 1 or 2 s-5's   but if I had 20 or 30 no.  I think I am just a bit too hot see below.