Been reading about a lot of dying sp20's

[philipma1957]

I am leaving this open until Monday.  I will then total full results.

[1714131164]

1714131164

[Finksy]

I found it helpful to reduce the power to the rear chips using the loop wattage limit. Helped keep them at a more consistent temperature, the cooling design wasn't exactly optimal in the SP20.

The design isnt bad, its just thats how these long tunnel designs work, the chips closer to the exit of air are gonna run hotter.
Whats funny is on all 4 of mine its the rear chips that peform the best / most efficient and they run hot as fuck =P

Sorry to go OT Phil.

That's strange, I had the exact opposite results. Efficiency went up for me when running fans at 100% and dropping avg ~10*C as opposed to running fans @ minimum. IIRC it was a 3-4% jump, but don't quote me on that. This was across about a dozen units, but was not actually measured at the wall (went by software readings).

[philipma1957]

I found it helpful to reduce the power to the rear chips using the loop wattage limit. Helped keep them at a more consistent temperature, the cooling design wasn't exactly optimal in the SP20.

The design isnt bad, its just thats how these long tunnel designs work, the chips closer to the exit of air are gonna run hotter.
Whats funny is on all 4 of mine its the rear chips that peform the best / most efficient and they run hot as fuck =P

Sorry to go OT Phil.

That's strange, I had the exact opposite results. Efficiency went up for me when running fans at 100% and dropping avg ~10*C as opposed to running fans @ minimum. IIRC it was a 3-4% jump, but don't quote me on that. This was across about a dozen units, but was not actually measured at the wall (went by software readings).

Close enough to topic. Along with fail rates any good info on repair or preventing failures is not too off base.
Rants and complaints are too far off topic.  I got a lot of info on the gear in this thread.  I will try to summarize and present it on Monday. Then move to the s-5.

[notlist3d]

I have had 2 SP20's. Both have been mining since almost release.   At first I did mine in the area of 1.5T, never pushed it to try to get what was claimed max speed.

For summer both have been underclocked to very efficient settings.  No problems, no issues, no dead parts etc.

Not sure if your are collecting this or not but had high quality ATX PSU's on them since day 1.

[rkinnin]

trying to understand why owners of sp-20's run them under 1.7Ths so much. 

I would like to get one still trying to understand why I would not run it at 1.7 if I have horsepower under its hood to do so.

Thank you in advance for anyone's thoughts.

[Finksy]

Long story short:  They aren't 1.7TH/s miners.  Only a small-ish minority of people have had them consistently run what they claim to, and I imagine these were in ideal conditions (climate controlled data centers). When I was running mine in a ~27*C large basement, the most I could get was about 1550-1600, and that was running fans full blast and chips still HOT.

It would be equivalent to the S5 being released as a 1.45 TH/s miner.

[rkinnin]

Long story short:  They aren't 1.7TH/s miners.  Only a small-ish minority of people have had them consistently run what they claim to, and I imagine these were in ideal conditions (climate controlled data centers). When I was running mine in a ~27*C large basement, the most I could get was about 1550-1600, and that was running fans full blast and chips still HOT.

It would be equivalent to the S5 being released as a 1.45 TH/s miner.

prefect....thanks!

does that mean that the ole sp10's never ran at 1.4 Th/s ?

[Biffa]

2 SP20's running since Oct/Nov with no problems so far.

One of them was a Batch1 and the cards had come loose in transit, opened it up and reseated everything and its going fine.

Replaced the fans with quieter (less powerful) ones from the start, so run at 1.3-1.5TH depending on ambient

[HerbPean]

I have two SP20E, one broke by my negligence of abusing of the cool air outside during the winter (staying to close to the cold air). I had one running his fan at 40% and the other at 30%. The first one always been less cold then the other one. that said, the one at 40% broke and the other still runs rock solid at 1500 in the summer (I have cheap electricity). I assume the 40% got all the shit and protected the other one of any other thing that would sneak inside the room (which i though would be not possible since the unit were hot but I was wrong and I learned from this mistake). So I would consider my failure as a user miss utilization.

I was able to run them close to 1650 without any issue until I broke one of the two by an accumulation of Hot and humidity inside. (Corroded the first circuit (first two asic))

Why i'm pushing them that hard ?
1. cheap electricity
2. I prefer having more BTC then focusing only on maximizing profit since they have a short lifetime, I used them as much as I can.

That's my 2 cent

[wpgdeez]

Long story short:  They aren't 1.7TH/s miners.  Only a small-ish minority of people have had them consistently run what they claim to, and I imagine these were in ideal conditions (climate controlled data centers). When I was running mine in a ~27*C large basement, the most I could get was about 1550-1600, and that was running fans full blast and chips still HOT.

It would be equivalent to the S5 being released as a 1.45 TH/s miner.

prefect....thanks!

does that mean that the ole sp10's never ran at 1.4 Th/s ?

My SP10's ran between 1.2-1.3. I would get close to 1.4 when the intake air was less than -20c though. Turned them off a couple weeks ago. The silence is so beautiful

[mavericklm]

same here with sp10
fuck that winning!

mine was going 1.5 in the winter

[thsminer]

Have two SP20's running both at 1.45 with at a 850watt corsair since February this year
Did set the power drawn for each board so temperatures stay pretty equal.

[philipma1957]

going to close this a do a  final tally. thanks for all info


13     13 - 0     Philipma1957
50     50 - 0     shacky
27     22 - 5     Pt0x   -----------    but the 5 do recover with sd cards
  8      6 - 2      Xian01 ----------   a controller and a pcie issue fixed by owner
  3       1 - 2     p3yot33at3r ----- dead controllers
  2       1 - 1     r00t$ --------------    needs an sdcard and 2 bad asics
  9       9 - 0     Prelude ------------ all good has run them at 1.1th
  5       5 - 0     sjc1490 ------------ all good  run at 1.1 to 1.3th
 17     17 - 0    Tupsu --------------- all good
 17     17 - 0    Finsky --------------- all good some ip issues ran them hot 1300 to 1500gh
 58     56 - 2    MCHouston --------- 2 with dead asic issues.
 17     14 - 3    sidehack ------------- 3 with shipping damage
 1         1-  0    alh ------------------- 1 good with a slightly hot asic chip
 4         4 - 0    GenTarkin ----------- 4 good run 1250 to 1400
 4         4 - 0    tlhIlwI---------------- all good but the eBay purchase runs hot
 1         1 - 0    CrazyGuy ------------ 1 chip runs hot but works
 3         2 - 1    Biodom --------------- 1 all good 1 runs hot 1 came doa easy fix
12       10 - 2   Quakefiend ---------- 2 dead controllers
 1         1 - 0    edonkey -------------- all good runs a bit hot

6          6 - 0    LeeC -----------------  all good run at 1300
4          4-0      goxed ---------------- all good 4 at 1000gh
35        35-0     Xircom --------------- all good at 1350-1400
4           2-2     mitak64---------------  2 just died
2           2-0     notlist3d -------------- 2 underclocked
2           2-0     Biffa ------------------ 2 at 1.3th to 1.5th
2            1-1    HerbPean ------------  1 died to to op error got it too damp
2            2-0    thsminer---------------  1.45th
4            4-0    mavericklm -----------  all under 1.4th
----
so of the 313  looks like 291 still run  and 22 needed parts from sp-tech or run a bit less then then should or are dead

[mavericklm]

count me in with 4 units
all ok under 1.4th!

[philipma1957]

added mavericklm and put in 1 more that died

so 291 and 22

of the 22 some were fixed

but lets judge hard  first and say all 22 are fully dead  the good to bad rate is 92.9%

lets judge easy  and say of the 22 with issues only 13 are dead

so 300 and 13 =  95.84% good to bad rate.

going to close this a do a  final tally. thanks for all info


13     13 - 0     Philipma1957
50     50 - 0     shacky
27     22 - 5     Pt0x   -----------    but the 5 do recover with sd cards
  8      6 - 2      Xian01 ----------   a controller and a pcie issue fixed by owner
  3       1 - 2     p3yot33at3r ----- dead controllers
  2       1 - 1     r00t$ --------------    needs an sdcard and 2 bad asics
  9       9 - 0     Prelude ------------ all good has run them at 1.1th
  5       5 - 0     sjc1490 ------------ all good  run at 1.1 to 1.3th
 17     17 - 0    Tupsu --------------- all good
 17     17 - 0    Finsky --------------- all good some ip issues ran them hot 1300 to 1500gh
 58     56 - 2    MCHouston --------- 2 with dead asic issues.
 17     14 - 3    sidehack ------------- 3 with shipping damage
 1         1-  0    alh ------------------- 1 good with a slightly hot asic chip
 4         4 - 0    GenTarkin ----------- 4 good run 1250 to 1400
 4         4 - 0    tlhIlwI---------------- all good but the eBay purchase runs hot
 1         1 - 0    CrazyGuy ------------ 1 chip runs hot but works
 3         2 - 1    Biodom --------------- 1 all good 1 runs hot 1 came doa easy fix
12       10 - 2   Quakefiend ---------- 2 dead controllers
 1         1 - 0    edonkey -------------- all good runs a bit hot

6          6 - 0    LeeC -----------------  all good run at 1300
4          4-0      goxed ---------------- all good 4 at 1000gh
35        35-0     Xircom --------------- all good at 1350-1400
4           2-2     mitak64---------------  2 just died
2           2-0     notlist3d -------------- 2 underclocked
2           2-0     Biffa ------------------ 2 at 1.3th to 1.5th
2            1-1    HerbPean ------------  1 died to to op error got it too damp
2            2-0    thsminer---------------  1.45th
4            4-0    mavericklm -----------  all under 1.4th
----
so of the 313  looks like 291 still run  and 22 needed parts from sp-tech or run a bit less then then should or are dead

I will start an S-5 on Weds.

Thanks one more time