Bitcoin Forum

A while ago somebody posted a list of replacement fans for S9 units with links to Amazon / Newegg and a few other places.
It listed which ones were quieter / more powerful / etc.

I went back through posts here till 2017 and could not find it. Does anyone still have the list or a link to it.

Thanks,
Dave

Delta QFR1212GHE is a good replacement fan and quite widely available.

That part I have. But someone had the "complete list" kind of thing.

What did work, what did not, what was quiet but ran to hot, etc.
I thought it was here, I am wondering if I saw it on reddit or someplace else.

Thanks,
Dave

Enermax D.F. Storm are quiet but run too hot with stock S9.

Noctua industrialPPC are even more quiet, but run even hotter with a stock S9.

Ofc this story is different if you have a well underclocked S9 or other miner.

I have my low power fw Avalon841 running with one Noctua industrialPPC 3000rpm model

That was the kind of list I was looking for.
Going to have to spend some money at Amazon to play around.
I just didn't want to go for ones that are a known no-go due to heat.

Thanks,
Dave

The key point to remember with s9's is that the fans have to work against a fairly high airflow resistance cause by BM's insane mass of small heat sinks. That means they have to produce high static-pressure which is why they run high rpm. That in turn = loud.

Unless the miner is UC/UV'd there is no getting around this.

100% true....with a but...
I have many S9 units that are not 100% great.
They are really worth zip at the moment. Nobody wants old, flakey miners. By the time I ship them everyone looses money (except FedEx Ground)

However, I can put in fans that are quiet and use them as small heaters in the warehouse over the winter.
It is never going to get above 40F in there so I can run them with lower speed / lower noise fans and the miners are probably never going to care.

If they do go get to hot they shutdown. If they loop between being too hot and then 40F and this causes the hash boards to finally fail, no big loss the beagleboard is probably the only thing that is worth money.

Sad that it has come to this, but it is what it is.

-Dave

read my mod for a quiet s9 it the fan will cool 😎  2 board miner and it is fairly quiet .
it is in hardware titled what to do with old s9s

i will bump to the top

How much can you sell your miners for locally ? I know S9s are becoming kind of worthless to many people out there, but they still hold some value, why not get rid of them for 100-150$ while you still can ? it's better than "torturing" them with low fan speed.

as for the winter heating , it does make sense, but if say nothing major happens in BTC price till winter ends, then you won't be able to get a 100$ not even a 50$ for those S9s.

You would be surprised. I know someone that buys them simply because they are cheap enough that can be repaired or used for parts, if you sell them cheap enough (around $200) it is in fact the last chance to get rid of them...

As heaters you can always play with BraiinsOS and force them to different speeds, if they get too hot just slow them (UC/UV) down... And perhaps removing the middle board helps too.

The problem is I was getting offers of at best $100 / $125 shipped for old S9.
Hell I could not sell someones CLEAN AND 100% PERFECT T9+ for $150 shipped: https://bitcointalk.org/index.php?topic=5189815 (https://bitcointalk.org/index.php?topic=5189815)
S9 units with wonky hash boards and dirty fans were not even getting any looks.

But I did get offers for the controllers for $50 to $75 shipped. So a small board that I can ship easily anywhere in the US for under $10 that I will never hear about again is a lot easier then selling a heavy miner that has issues. But you do wind up with a pile of hash boards in the end.

I would like to thank everyone on the fan advice I have a few fans coming in to play with.

-Dave

150$ for T9 is a terrible deal, even if its brand new, you shouldn't be comparing those to S9, by the way if you have a serious offer for the control boards i might be able to buy those hash boards from you, i have a client looking for some, let me know how many you got.

And by the way, dirty fans can be easily cleaned with a blower and a brush  ;D