Same frequency for 2 S1´s, but different fan values

[oskuro]

Hi, i have 2 S1. The "old" one, bought 2 months ago has these values:



and the new one, which is second hand, has these values(better ones):



They have same frequency and configuration. Both overclocked to 200 GH/s.

So why the value of one of the fans is 3720 with 58 and 57 temperatures, and the other one has 2700 with 50 and 49?.

Of course new S1 has just been working for 2 hours, and the other one has been working for almost 2 months, but... fan value is strange.... or not?

thanks

[1714980636]

1714980636

[1714980636]

1714980636

[Mister S]

58c and 57c are pretty hot for the antminer s1. Make sure the heatsinks are torqued down and not dusted up. The reason the fan is spinning so rapidly is because the temp sensor is reporting a high temp, so it spins up to max to cool it. Take it down to 350mhz (180 gh/s) for a little bit and see if the temps improve.


Important questions.
Is the miner in an enclosed area, or is airflow restricted in some way.
Is the temperature the correct temperature, or is the temp sensor failing.
If it really is that hot, do you have a way of directing more airflow onto the heatsinks
Do you have the 2 fan setup, or single fan intaking.

Keep in mind not all antminers were created equal. 1200 caps were worse on heat and errors than the 1500 caps.
Since the hot miner is the old miner, this makes sense, and you're going to want to direct more cooling onto this one.

[oskuro]

58c and 57c are pretty hot for the antminer s1. Make sure the heatsinks are torqued down and not dusted up. The reason the fan is spinning so rapidly is because the temp sensor is reporting a high temp, so it spins up to max to cool it. Take it down to 350mhz (180 gh/s) for a little bit and see if the temps improve.


Important questions.
Is the miner in an enclosed area, or is airflow restricted in some way.
Is the temperature the correct temperature, or is the temp sensor failing.
If it really is that hot, do you have a way of directing more airflow onto the heatsinks
Do you have the 2 fan setup, or single fan intaking.

Keep in mind not all antminers were created equal. 1200 caps were worse on heat and errors than the 1500 caps.
Since the hot miner is the old miner, this makes sense, and you're going to want to direct more cooling onto this one.

well i said old miner, but was bought new 2 months ago.

They have just single fan, but i want to buy another fan for both, maybe 4 fans like this one?:

http://www.newegg.com/Product/Product.aspx?Item=N82E16835553002

the miner well yeah, is in an enclosed area, not the best area possible, i plan to change that too.

sensor is ok, because fan also spins faster because of temperature.

ok i will take it down to 350 mhz and see if temps improve.

thx

[Mister S]

well i said old miner, but was bought new 2 months ago.

They have just single fan, but i want to buy another fan for both, maybe 4 fans like this one?:

http://www.newegg.com/Product/Product.aspx?Item=N82E16835553002

the miner well yeah, is in an enclosed area, not the best area possible, i plan to change that too.

sensor is ok, because fan also spins faster because of temperature.

ok i will take it down to 350 mhz and see if temps improve.

thx

http://www.newegg.com/Product/Product.aspx?Item=N82E16835553002
No, not this one, because the CFM rating is too low.
While it's flashy and pretty, a double deep 120mm rated at 100+ cfm is ideal.

http://www.newegg.com/Product/Product.aspx?Item=N82E16835706032
This is the fan type you should be looking at, 4k rpm, 110 cfm.

[philipma1957]

those fans do not move enough air .  are you in the usa.  i have some really loud powerful fans that would help you.

I can fit them in a padded flat rate and ship them for 6 bucks. to all 50 states   I paid 14 each I don't want 14 each.  pm me for more photos

[oskuro]

well i said old miner, but was bought new 2 months ago.

They have just single fan, but i want to buy another fan for both, maybe 4 fans like this one?:

http://www.newegg.com/Product/Product.aspx?Item=N82E16835553002

the miner well yeah, is in an enclosed area, not the best area possible, i plan to change that too.

sensor is ok, because fan also spins faster because of temperature.

ok i will take it down to 350 mhz and see if temps improve.

thx

http://www.newegg.com/Product/Product.aspx?Item=N82E16835553002
No, not this one, because the CFM rating is too low.
While it's flashy and pretty, a double deep 120mm rated at 100+ cfm is ideal.

http://www.newegg.com/Product/Product.aspx?Item=N82E16835706032
This is the fan type you should be looking at, 4k rpm, 110 cfm.

and with just 2 will be fine? i mean, using stock fans of S1 and buying 2 Delta FFB1212EH-PWM. Or buying 4 Delta FFB1212EH-PWM ? They are not very cheap

And if i just buy 2 Delta, should i place them front and placing S1 fan rear? thx


edit: thanks philipma1957  but im from SPAIN

[oskuro]

ooops houston, we´ve got a problem

Changed frequency to 350 and fan still same speed(i think now even a little more, and temps are the same....):

[Mister S]

Yep, definitely an airflow issue.

You'll want to get two of the delta I linked, and set them up as the EXHAUST fan, airflow going from the back of the miner to the front.

So... On the side of the S1 with the WIFI antenna connector, Delta 150cfm, facing outward (Exhausting)
Back of the S1, the OEM fan, intaking (Airflow pointed to the heatsink.)

This will create a slight negative pressure wave, pulling more air over the heatsink.

Also, pull the blue wires from the connector of the OEMs fans, this will set them on full speed all the time.

If you're still that hot at stock clocks, either the room ambient temp is WAY too high, or the fans aren't able to cycle cold enough air over the heatsink to remove the heat.

Place a thermometer on the heatsink and verify the temps.

[oskuro]

Yep, definitely an airflow issue.

You'll want to get two of the delta I linked, and set them up as the EXHAUST fan, airflow going from the back of the miner to the front.

So... On the side of the S1 with the WIFI antenna connector, Delta 150cfm, facing outward (Exhausting)
Back of the S1, the OEM fan, intaking (Airflow pointed to the heatsink.)

This will create a slight negative pressure wave, pulling more air over the heatsink.

Also, pull the blue wires from the connector of the OEMs fans, this will set them on full speed all the time.

If you're still that hot at stock clocks, either the room ambient temp is WAY too high, or the fans aren't able to cycle cold enough air over the heatsink to remove the heat.

Place a thermometer on the heatsink and verify the temps.

Oh, i thought it was like antminer S1 comes when you buy it, on the side of the wifi antenna connector, OEM fan pulling air inside, and back if you buy another one, another fan pulling air out. So you mean doing it the other way, back intakes air in pointed to the heatsink, and front fan(delta 150cfm), takes air out.

Its not better than best fan(delta), intakes air in pointed to the heatsink maybe from behind, and front i use OEM fan?(i dont know, just asking).

And you mean to cut blue wire so OEM fan works faster, right? thanks!

[Mister S]

Oh, i thought it was like antminer S1 comes when you buy it, on the side of the wifi antenna connector, OEM fan pulling air inside, and back if you buy another one, another fan pulling air out. So you mean doing it the other way, back intakes air in pointed to the heatsink, and front fan(delta 150cfm), takes air out.

Its not better than best fan(delta), intakes air in pointed to the heatsink maybe from behind, and front i use OEM fan?(i dont know, just asking).

And you mean to cut blue wire so OEM fan works faster, right? thanks!

From the factory, the OEM fan comes pointed in on the heatsink, you're going to reverse that flow, and add your pusher fan to the back of the unit. Having both fans blowing inward would create positive pressure, this is BAD for airflow, especially on the curved blade heatsink. The Delta, 150 cfm, is faster than the oem fan, which is incidentally the same as the Avalon fans, which were rated at 120 cfm. so, 120 CFM blowing from the REAR to the FRONT and the Delta pulling that air out at 150 cfm.

  

   Wifi
       I
<--[] ####### [] <---
   Delta           OEM

Yes yes?

Now make sure there's 3-4 inches space behind the S1.

And NOTHING in front of it.

This is how all 12 of mine are set up. I don't see temps above 48c on any of them.

[philipma1957]

keep the old fan where it is  let it  blow into the unit   add the new delta to the empty end let it [b/]suck out of the unit[/b]

 always let the weaker fan blow in  the stronger fan suck out  ..  


 if you look at my photos the oem fan stayed in place and it is a 110-120cfm fan

 my add on fan is a 140 delta ..

see the pipe cleaners  with spacers to hold the new fan.

in this photo the weaker oem fan never moved  it blows in.  the stronger delta sucks out...     see how i powered the delta.  piggyback on the screw in power supply.

   it is a full speed 24/7  plug them uncut new fan into this 


   i got some of these cheap and cut them


http://www.amazon.com/Syba-SY-CAB65007-Female-Connectors-Extension/dp/B002G1YNQS/ref=sr_1_6?ie=UTF8&qid=1403663082&sr=8-6&keywords=3+pin+fan+cable

[Mister S]

keep the old fan where it is  let it  blow into the unit   add the new delta to the empty end let it [b/]suck out of the unit[/b]

 always let the weaker fan blow in  the stronger fan suck out  ..  


 if you look at my photos the oem fan stayed in place and it is a 110-120cfm fan

 my add on fan is a 140 delta ..

see the pipe cleaners  with spacers to hold the new fan.

in this photo the weaker oem fan never moved  it blows in.  the stronger delta sucks out...     see how i powered the delta.  piggyback on the screw in power supply.

   it is a full speed 24/7  plug them uncut new fan into this  


   i got some of these cheap and cut them
[snipped for space...]

It's been stated the miner is in an enclosed area. Even if it won't be for long, in it's current situation it makes sense to exhaust out the front, rather than trap and recirculate warm air.

In any event, that could even mean installing it as philipma1957 is showing, then just turning the unit around.