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I believe it is possible to set the operating Mhz of the chips (from what I've seen from the videos on Youtube). I wonder if there is a point where I can completely shutdown the fan or run it at an acceptable level.

This is because I want to host them in an office and only start them at night or at low speeds.

no it always needs a fan.  but you can swap fans and run down clocked to get okay sound levels.


to be honest you fucked up buying these units if sound was the main issue.


here is the quietest miner in production.


http://ehash.com/product/avalon4-module-1t/


run at 850gh sound is not a problem at all.


your s-5 fan is monster loud even at 850 gh instead of stock 1150 speed.


there are mods to the sound on an s-5 but it will never be as quiet as the avalon 4.1  I got s-5s to 55db while the avalon 4.1 is 42db.


Next time ask before you buy. I say that because your post's seem to suggest you already have the s-5's


there are more threads on the avalon 4.1 then this one:
https://bitcointalk.org/index.php?topic=951758.0

still looking for fan mod thread on s-5

https://bitcointalk.org/index.php?topic=945775.msg10361488#msg10361488


still looking for more s-5 fan threads>>>>>>> got one! see below:

https://bitcointalk.org/index.php?topic=927941.0

I ordered one unit. It's on its way.

I will find a place, don't worry.

I also found these pages for the interested.

Thanks for the reply.

http://www.gcaudio.com/resources/howtos/loudness.html

http://www.head-fi.org/t/615928/an-intricate-decibel-equivalent-table-what-is-how-loud-from-10-to-310-db

My 2 s3's are pretty quiet compared to my s5. an s5 underclocked will still run loud because of the temps, they get pretty warm regardless of what you do.

No fan... would not be possible unless you lived in a extremely cold ambient.  I have never seen anyone run without a fan.

You will want to look into fan's doing push/pull (with quiet fans) and most likely a under clock with it.  Between those things you could get it to run much quieter but you will lose hash speed most likely.

Then probably I'll run them at night when no one is around.

Do you have any practical way of hosting a single unit outdoor? A small closet maybe?

worst possible idea since it has 600 watts of heat. unless closet has ac and a vent out.

really should have asked us before purchase.

is power "free"

if so s-3's   use 400 watts and if under-clocked to 400 gh they use 300 watts.  s-3's are pretty easy to make quiet.

maybe some one would buy the s-5 and you put in 2 s-3's instead.  (this only works if power is "free")

I hate sounding negative and telling  you should have done something other then you did.  

@ op

yeah this is most likely your best choice.

Before I would take a loss on it I would get quiet fan's in a push/pull and under clock.  You will have approx 20 or so per fan extra costs to get a nice quiet ones.   

But I would at least try a quiet push/pull with good under clock before selling it since you already invested in it. 

Honestly if quietness and/or low heat output are the main concerns s3/s3+ would be your best option as long as you don't care its a little more watts per ghs. I'd say my s3's are quieter than a window ac unit, the s5 is/seems to be louder.

average s3/s3+ - ~450g/360w
s3/s3+ uc'd/volted - ~300g/170w

Just to be clear I was assuming it's a office he has permission and just did not want noise during day.  If it is a "hidden" miner I don't support that at all and suggest him moving it home.

GT1850 fan should do the trick, almost no noise but strong airflow, but difficult to find, maybe in china

What voltage for 170W ?

yeaaaaa... as stated, not only would it ruin any warranty but it is never a good idea to operate the unit without the fan.

Try immersion.

Yeah right now I'm talking with 3M to get 10L of that liquid.. :)

I just searched for a little bit but I couldn't find any small scale equipment right away.

However I think it's possible to install it myself? Right? At least in practice?

Need to check the price of that liquid!

It's not cheap  :'(

http://www.ebay.com/itm/3M-FC-40-FLUORINERT-32oz-Ready-to-Ship-/110716728982

http://www.ebay.com/itm/3M-FC-3283-Fluorinert-1-Gallon-new-surplus-/161682717549?pt=LH_DefaultDomain_0&hash=item25a50a7b6d

at least you can always use sunflower oil if you like to live dangerously.

By the way, I forgot to share the link I saw the 3M Novec liquid.

https://www.youtube.com/watch?v=a6ErbZtpL88

Immersion cooling is awsome but expensive and difficult to implement. Especially in home.

Actually, the link that SerialLain included isn't the correct kind - you're looking for Novec 7000 series.  The big difference is the boiling point of the liquid - the eBay one boils at 165c, so useless for cooling, the Antminer would have burned out well before encountering this.  Novec boils at 34c (93f!), which really is amazing... Of course, this means your ambient environment needs to be far less than 93f, I believe they recommend in the 70f's.  And don't forget this still requires a radiator inside of the Novec chamber typically with water moving through it, acting as a cooling mechanism to cause condensation.  If you're seriously considering something like this, they made a really good video on how to actually do it here:

https://www.youtube.com/watch?v=ivVoANqFBuY

It's more practical and less sales pitch than the other linked video.

Yes actually I believe the correct one is 3M Novec 649.

3M continues to amaze me with these kind of things.

Awesome, it's cool stuff :)

A fish tank with distilled water and a closed loop system would be a good experiment, and cheap yeah.

 A risk of electrolysis  ?   but I would love to see it.

I doubt you could run it without a fan, you could run it with quieter fans than the standard noisy beast it comes with as standard though ;).

yeah I got it to 55db  vs 70db for about 20 bucks.

Distilled is not conductive.


Unless it becomes dirty, that's why filters exist.

Why not stick it in a fish tank filled with veg oil? Easy peasy.

Nope, bacteria will grow.

Maybe mineral oil , but is high viscosity and has slow circulation.
Also, not thermally conductive.

Dropping a half bottle of Diesel Kleen in there will solve that problem. Make sure it has a lid and you should be good to go. Wish I had a spare S3, I'd give it a trial run myself. Sounds interesting.