Read the release notes for Blissz firmware, there was a version where he allowed "fan speed zero", and I believe it is intended to disable all fan checks and/or allow you to run a 3rd party non-PWM fan.  I'm not set up yet to test that myself though.

New to XLM myself as of today, that difference also confused me, but alas did not yet have a validated Poloniex or Bittrex account... ended up using Kraken (from the US) which despite numerous gateway (cloudflare) errors, managed to get my XLM in the end.  Frustrating experience though.  Look forward to trying the other exchanges.

Got it in the middle of the pump this AM due to Godex news (without errors would have been beginning of the ramp), but having a cold needed a nap and missed the peak to double my stake, guess I'll be here and keeping a eye on this project for a while.   Cheers!

Just a note regarding moderately elevated chain/chip temps.

My chain 3 chip temp was consistently about 8deg higher than 1 and 2, (often edging over 80deg).

Last time I shutdown I took the opportunity to move chain 3 into the chain 2 position, the logic being there is more airflow in the centerline.

This seems to have WORKED.  While still a nudge higher than the other two, it behaves much better relatively.  Or at least it's sensor is happy.  ;-)

Cheers,
Ryan

I can confirm those Zettaguard units (and the HomeMate App) also work great on 220-240v@60hz (US).  The packaging says nothing about 240v, so it was a bit scary the first time I powered on.  But yes, adapters may be required if you order the US versions.  I think their internals don't vary for the international versions... hence why they work across standards.  Not sure about 50hz countries though.

I preferred all my 240v stuff be L6-20 or L6-30, but these guys made me build an inline adapter to Edison so I can selectively monitor 240v.

Do note that they are still rated for 15A, which may be below what your 240v PDU outputs are rated for.   Max 2 D3s per Zettaguard at 240v, 1 each would probably be safer unless you are using 2400+w server supplies and have no choice.

thistle.

Did I read the thread correctly that you opted against these after testing?  I was also curious why their website advertises 43db when you were measuring 60ish.   There must be some rule about the distance of the measurement that is standard?   43db would have been a win over the stock fans for sure (but lower RPM/flow of course).

(Edit: if so too bad, the 6 year warranty is hella-appealling!  You could migrate your fans to the next gen of 120mm ASIC miners).

thistle

That is alot of Novec fluid, maybe 2-3 gallons! (the cost of a D3).  Fans and heatsinks aren't necessary in a Novec closed loop system, i've seen better where the hash boards just lie flat on an aquarium bottom and maybe only 1/2 gal of fluid is needed.  In closed loop you still have to cool the condensing surface somehow.   Probably less efficient but a peltier cooler strapped to a large heatsink or plate might be less messy.  Not for dash, those things are energy hogs, perhaps workable on another coin, or if the one cooler rig is all you need for lots of hashing boards.

My exchanger/condenser thoughts lean towards a wort-chiller rig or plate heat exchanger with a DIY cooling tower outside to cycle the water.  But my first attempt will be to just pump and exhaust the oil heat directly.  Pumping water is better, as you are't restricted to the types of pumps that will do the job and not break down, but I think the small food-grade pumps can handle oil and are pretty cheap.  If you are after parts for your rig the automotive and home-brew industry seems to be a good resource.

Off topic, but only slightly considering Blissz originally set out to make a silent machine...

That is the fancy 3M Engineered Fluids method... the hippy non-toxic way is to just use mineral-oil or some other suitable dielectic blend.  About 90$ for 5gallons.  Less in quantity.

Note, there are some serious hippies out there too!  Not just over-clocking gamers up for a laugh.
https://www.grcooling.com
and the NSA
http://grcoolingv2.staging.wpengine.com/wp-content/uploads/2017/08/NSA-Doing-More-With-Less.pdf

Note one of GRCs products is a "hash-tank" comprised of S9s up to 5800Th/s squeezed into a 40' shipping container.
https://www.grcooling.com/bitcoin/

The tricky bits are circulation and heat exchanging... but not problems that haven't been solved a million different ways before.  I'm leaning towards trying a recirculating pump and a automotive transmission oil cooler+fan outside for my baby farm (two D3s)!   If I lived in a colder climate I would consider a classic household radiator and dump the heat inside seasonally.  If that can't move enough heat I'll have to try to build a evaporative cooler and heat exchange with water.

Take a journey down the antminer immersion cooling youtube rabit hole:
https://www.youtube.com/results?search_query=Antminer+mineral+oil

Nice camera setup...

I was about to recommend this product, which is a 240v rated (I'm using it at 240) smart plug that can also track usage, but it appears the usage function has died on me (or their app is mis-behaving).  hah.  (Note, I do not recommend exposing your miner's power source to the internet for extended periods of time, this was just convenient for testing).

Zettaguard S31 (Amazon Link)
https://www.amazon.com/Zettaguard-S31-Blue-Wireless-Electronics-Smartphone/dp/B0727S8N72

Some more feature requests...

 - Perhaps trivial, display Temps in both C and F on the admin interface.

 - Re: ability to swap pools around easily... perhaps just a UI change to the config form... add ability to add pool rows, but also include a tickbox to enable/disable them, would at least save the copy/paste shuffle step.

 - I have some IO/GPIO ideas too, but I need to take a closer look at the beagle-board black that bitmain is using.   (Like the ability to add an ambient [intake] breakout temp sensor, and trigger shutdowns or profile changes that way too).

Fan 0 Setting...

Is my understanding correct that at this setting the firmware cares zero f*cks about what the sense cable says.  You mentioned this enables 3rd party fan mods... so is it still gonna spew 12v on two wires, but do nothing with the control and sense?  Or are you implying powering the 3rd party fans directly off the supply?

Cheers!

I'm also wanting to know this, Blissz made it sound like YES in the feature set?
More importantly, for those of use considering fanless immersion approaches, will it boot and run with no fans detected (unplugged!)??

Unplugging after boot is an option too, but annoying for remote management.

I plan to test both scenarios soon, but i'm afraid to run it for even a few seconds with no air movement.  Don't have the oil bath built yet.

Hoping the firmware hacks are the solution, rather than the more involved hardware hacks to fake the fans.

I will probably also have that problem, in a moderate climate with 70-80F temp highs even in winter.

Maybe a way to "proportion" the auto setting... some % value.  Can be below or above?

(real first post, with actual content...)

D3 was my first miner (due to deflated ebay prices).  Have enjoyed this thread so far and happy to see the progress with the firmware improvements.  Look forward to testing it on my D3, which, as an in-tiny-home machine will benefit greatly from reduced noise, even at a slight profit loss if the DASH price keeps going up.   After I get my break-even ROI I plan to experiment with immersion cooling so it can tolerate the warm summer months here.  Using it to heat the house right now.

Thank you Blissz!    I don't feel the dev-fee is too high.   Some wealthy donor (not me yet) needs to send you an L3+ and a S9 to expand on these improvements.

My wish-list...

 - now that you have auto-reboot maybe working, add a "record uptime" field to the |system| tab.

 - optional field to configure for emailed notices, if possible? sendmail and mail exist, but my test messages have not arrived (perhaps anti-spam measures).

 - optional notice after a reboot?

 - optional emailed notice if that machine mined a block!  (for those crazy solo miners)

 - fix whatever needs to be fixed to allow "foregrounding" of cgminer process in ssh.  (I get a term-type error of some kind when trying).

 - 2nd'ing another's request for cron style scheduling of mining "profiles"... one profile should be "idle" too if possible, minimum fan speeds, minimum energy (might require a reboot to get out of it).

 Edited to add:
 - "shutdown" button to the system tab.  I have a smart-plug I can remotely kill it with, but just pulling power is not ideal, as the shutdown sequence leaves the fans running to let it cool.

 - Alter this shutdown behavior to ramp down fans to minimal, (equivalent to requested 'idle' profile).

Will post others as they come to me.

Today's record high DASH prices might have something to do with the profitability change.  That or the user's personal utility costs.

PS, first post.  ;-)