antMiner S7 fan replacement, won't stop beeping and not hashing

[strangerhacks]

I have an S7 I've been running for quite awhile now and the fan has started making this god awful whistling sound I can hear through out my house, it's located in my basement and my bedroom is on the second floor and I can hear it as though it's in the room beside me.

Long story short I needed a new fan so I bought a 140mm Noctua Industrial 3000rpm fan as it has very similar air flow readings to what I've found the stock fan to output.

I used a 140-120mm adapter to hook it up, plugged the fan it, works fine for exactly 1 minute and then it starts beeping and stops hashing, I tried lowering the frequency all the way down to 100 and it still beeps at me and won't stop, I hooked up the old fan in the second fan pin header (I should add this is an S7-F1 with only 1 fan) and after rebooting it, works totally fine, temps read about 70 degrees which is only 2 degrees higher than the stock fan and everything is totally fine, but, that stupid seizing loud fan is hooked up again making tons of noise.

Does anyone know a way around this? How do I run an S7 without the factory fan? It's running just fine with the 3000rpm 140mm Noctua, I don't need this other one hooked up but it won't run without it.

EDIT:
Similar question, I have three 1000w HP server PSU's and I picked up 6 40mm noctua fans for those, I took one apart and depinned the proprietary connector to wire in the Noctua fans, and when I plugged it in to test, the fans don't spin up, I'm assuming it's a similar situation where it will not work with aftermarket fans.
Any suggestions on this?

[gt_addict]

The noctua fans arent rated to the RPM of the standard fan thats whats causing the problem. Or you have bought 3pin fans and the miner requires 4pin with pwm signal.

I bought two replacement fans for my S9 (which were quieter fans) from www.eyeboot.com but if you dont want to get them from there you need 120x38mm 4pin fans. Delta QFR1212 model fans should work aslong as they are 4pin pwm thpe.

[VRobb]

I put a Sanyo Denki SAN Ace 120 3.0 Amp 12 Volt 120mm PWM in push, and a Scythe DFS123812H-3000 Ultra Kaze in pull.  Sounds SO much better!  Is it quiet? Not by a long shot, but it is much less noticable, and is both ears and wife approved!

HTH, mine on!

[strangerhacks]

The fans I bought are industrial grade noctua fans, 4 pin, is there any way to disable it's request for fan RPM? The fan is cooling it just fine as long as I leave the factory one plugged in and sitting there.

Alternatively I was thinking I might power the Noctua off of the PSU and set then fan speed for the board down to 0% if it'll allow that low, so far this is the only thing I can think of to get around this issue.

It's a rather stupid issue at that, especially when it has a fail safe to shut off is over 80 degrees, I don't see why fan RPM needs to be taken into consideration for these.

[VRobb]

I think gt got it right, it is a PWM fan but it's not fast enough at a given % power so the controller doesn't like what it sees and bails.  I did use the one you've got on my S5, that worked fine, but I guess not on the S7...  

[philipma1957]

The fans I bought are industrial grade noctua fans, 4 pin, is there any way to disable it's request for fan RPM? The fan is cooling it just fine as long as I leave the factory one plugged in and sitting there.

Alternatively I was thinking I might power the Noctua off of the PSU and set then fan speed for the board down to 0% if it'll allow that low, so far this is the only thing I can think of to get around this issue.

It's a rather stupid issue at that, especially when it has a fail safe to shut off is over 80 degrees, I don't see why fan RPM needs to be taken into consideration for these.

they will never work  go look in the mirror and say damn I fucked up.  say it a few times then  buy a fan that works.

I mean it in all seriousness and I am kidding a bit..   I have had  50 fans and tested them some work some do not that is one that does not work.

The scythe works  the sanyo ace works.

yeah it sucks but the noctua will not work.

[strangerhacks]

This is really disappointing, does anyone know of a way around this by disabling the rpm check in the firmware?

I was looking and hoping to find some custom firmware mods for a work around and I came across something called Mintorro, anyone know if this will allow me to use any fan? This 140mm Noctua PPC 3000rpm fan is working really well on this thing, I don't want to give it up for another stock fan

EDIT:
If anyone else is wondering or having this same issue, I have the Noctua hooked up to the power supply for power, and the stock fan hooked up to the miner board with the fan speed set to 0%, the stock fan still spins for some reason but it's spinning at 1680rpm so it's not making any noise at all and the entire rig right now is super quiet, it just looks ghetto as hell having a fan hanging off the side the way it is right now which is why I would really like to find a way around this by disabling the rpm check so it will just allow me to use a fan with a lower than factory rpm.

It's also kind of stupid how it will allow you to run a stock fan below 3000rpm, but a 3000rpm fan triggers the warning as not being enough..

[fanatic26]

There is no way around the RPM check. You can delete the wire that allows the miner to control fan speed itself but the RPM check must stay in place. The fix is to purchase a fan that is within spec. You need a fan that can do at least 4500 rpm from what I have experienced wit the S7's.


P.S. Dont trust the 80c limit in the firmware, I have had dozens of machines that heated into the 90s even with the shutoff set at 80c.

[gt_addict]

As ive said already the fans i got work and are quieter than standard fans. If noise is an issue then get the fans ive suggested and underclock the machine. Ive had an S9 running 5.8Th and making 50db under my desk and that wasnt a problem to sleep in the same room.