Topic: S-5 review. It has arrived some info is in! - page 9. (Read 19887 times)

if noise is not an issue they are pretty good.  I sold mine and he has an added pull fan.  it clocks to 412 and temps are about 58c.

I'll be ordering two of these when my last miner is gone. Noise doesn't concern me, the Bitmine unit I have here is noisy as all hell and is unbearably hot to run.

I clocked to 412 with temps at 58 and 56
I sold this miner to a local  miner from this forum.
 his setup will allow the loud stock fan and the delta 3 pin  which runs between 2800-3200rpm.

 I did my last test run this morning pretty good numbers if you don't mind the nasty sounding  77db fans.  this got about 1300gh at 676 watts that is close to .52 watts per gh  and maybe 10 watts is from that second delta fan.
 the stock fan 4 pin  (3900rpm) is the push
 the delta 3 pin (3100rpm) is the pull

Yes, the stock fan is quite loud, but it maxes out long before the ASICs register 60C, so unless I do a fan mod the high temp is not the cause of the noise. The heatsinks themselves are barely 50C, so I'm not worried about it at all.

That's crazy ! You must have some legendary S5 that was forged in Mordor... or something...

EDIT: Board temps <60C ?

as long as temperatures dont read much higher than 60C youll be fine i think. fan might get pretty loud though

I haven't seen any problems overclocking mine to 400M in a 40C room.

It's unfortunately not that simple; there's no guarantee you'll get a 200/200/100+100 split on the three cables. It won't really matter in the end as you know for sure that you aren't pulling more than ~25A per board even with a bit of an overclock, so you have a lot of headroom there.

In the case of the CX750M, I'd probably recommend going with a single double ended cable to each board.

in your case it does not matter   and it will be very hard to run at  freq 350 since your cables should not use 300 watts 24/7/365

the reason it does not matter is you are using 2 doubles from one single rail psu. do matter what you do on one s-5 the cables will be asked to pull 300 watts
_______________________________________________________________________________ ____________________________________________________
In the evga 1300 g2  case 3 cables per s-5 need to be plugged  in the right way to balance the load over each of the three cables.
-------------------------------------------------------------------------------------------------------------------------------------------------
BAD  not BALANCED

D S   left board  only uses the double cable the board wants to pull 300 watts = cable melt
|  |   right board shares 2 single cables the board  wants to pull 300 watts = 150 watts  for each those cables are fine.
|  |   this is an non balanced load to the psu bad
|  |
|  |
D S
 ^
fan
----------------------------------------------------------------------------------------------------------------
GOOD BALANCED


S   S
|    |   in this setup:
|    |   the top left  evga 1300 pull 200 watts
|    |   the top right evga 1300 pulls 200 watts      
|    |   the bottom double evga pulls 200 watts  100 from each board
D- D
 ^
fan

this works  

i think you will need to run at freq 275 to freq 325.

What is the potential for damage by running these in an hot environment? Where I work, our server room is pretty damn hot. Right now I run my miners outside my home. Its summer in Australia and its pretty brutal. My miners see 35 - 40c days and hot nights.

Should I be concerned running something like an S5 in this environment?

Not sure that I understand how this works.
For example, would this work (say, with CX750M that has only split connectors):

D D
|  |
|  |
|  |
|  |
D D
 ^
fan

I think that it should, I always used doubles on S3 like this. Or has it to be

D---D


D---D
  ^
 fan

Or criss-cross? Or does it matter?  I thought that a single rail system will balance the power draw at each 8 pin connector at the PSU (actually this is where he melted it). That is, I thought that 200W power would be drawn into each 8pin connector if you have 3 cables connected (at the PSU level) to a single 600W miner. Incidentally, since CX750M has only two cords, each would definitely draw ~300W at each 8pin connector while powering S5 at the default speeds.
Maybe I was wrong thinking about PSU balancing power, but would like to hear the physics behind the setups.

It has a 10 year warranty

It looks like those use the non-conventional 8pin PCIe graphics keying. Unfortunately, those are a huge PITA to find. It might be pretty tough.
However, you could snip the end off the bad cable, and wire it with a standard 8 pin Minifit Jr, and then plug it into the CPU spot.

Alright, so it (probably) can be fixed.  Any recommendations on where to buy the repair parts?

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.

http://images.craigslist.org/00606_jBOhOMWRRQg_600x450.jpg

Got it, so somehow the 8 pin goes down to a 6 pin.  So I imagine something like this would only be good for 7 ports then?  Unless is it reasonable to try to replace the melted plastic?

If there is some sort of guide to this that I missed, please let me know so I'm not clogging this up with already asked questions.  Thanks!

This question comes up quite frequently. The answer is that EVGA G2 has eight PCI-E connectors, not six as sometimes being posted. The reason is that there are 4 single and two branched connectors (4+2X2=8). Also, you are not using SATA, but VGA ports on the PSU.

I acknowledge this is an extremely stupid question, but its so stupid, I'm wondering if I'm just missing something or have just been drinking too much watching New Years college football.

A PSU like the EVGA 1300W SuperNova G2 has 8 - 8 pin ports (listed as VGA & CPU) and 6 - 6 pin ports (listed as SATA & RERP).  I understand the S5 needs 4 - 6 pin connectors as does the SP20.

So how does the math work here?  For the SP20, you just use the 4 SATA ports and you've maxed out the power.  But with you've got enough power for 2x S5s but only 6 - 6 pin connectors?
   

With the stock fan, 5V seems sufficient to get it spinning at a good speed, and creates significant airflow. I would suggest making a cover for the unit if too much air seems to escape upwards, as I feel like it improves air movement through the back half of the heatsink. (I used about 4 strips of clear packing tape)

at 26C intake and 5V i doubt youll achieve 350MHz. 325MHz is likely the limit. At 5C I can achieve 381.25MHz+, but at 15C running closer to 360MHz creates the same temperature readings.