Trading view ID:   RchGrav

Look forward to checking out the indicators

Any idea on the model number of that fan?  Trying to go by CFM and dBA on spec sheets I'm scouring... and when I start spec hunting I tend to go overboard.

and well... I went a little crazy...

I ordered a ridiculous SAN ACE 120 fan model 9SX1212P1K001.. (available from Mouser, Newark, Element14, Farnell, Arrow and Sager)

Here is a video of an older model Aluminum Sanyo Denki 6000 RPM fan...  

https://www.youtube.com/watch?v=XTdD5FXlrsk

The operation range of this fan is 15% PWM which is 2600RPM/88.2CFM @ 37dB to 100% PWM which is 7400RPM/257.7CFM @ 66dB

Can you get the numbers on the existing fan by any chance?

Or .. what CFM do you think is actually required by the miner to run at stock frequency under normal environmental conditions?

Hi Philip,

Good review so far.. I'm liking it better than I did in the first 24 hours.   I guess I was a little annoyed at everyone calling the miner a dud, before you made that proclaimation.. probably because I ordered one.

One thing is for sure, it sounds like its a noisy beast...

#1  Do you know what the stock CFM/RPM, etc is for the 12038 fan which is included.. and what its model number is, or a link to the specsheet?

I may have found a nice, quiet, pretty high cfm fan for a push/pull, or strictly pull configuration which would be sufficient for home mining. Looks like a great combo of watts, cfm, and noise levels.  How do you think it would fare on the S5 in terms of achieving proper cooling >1TH/s in terms of environmental requirements, room temp, or anything else you can think of.  I'm thinking this may be a nice upgrade for myself or anyone concerned with the sound levels of the miner.

http://www.digikey.com/product-detail/en/AFB1212HHE-TP02/603-1212-ND/2034815


Delta Fan - AFB1212HHE-TP02
------------------------------------------------------

Voltage	Rated 12VDC
Size / Dimension	Square 120mm L x 120mm H x 38mm W
Air Flow	120.1 CFM (3.40m³/min)
Features	PWM Control; Speed Sensor (Tach)
Noise	44 dB(A)
Power (Watts)	4.80W
RPM	2900 RPM
Termination	4 Wire Leads

------------------------------------------------------



Regards,

Rich

I have to live with my miners too..  oh, and believe me.. I'm all about the underclock and the tinker.. 

I think out of the gate its pretty well understood that the design of this miner and the BM1384 is such that it has a narrow overclocking and underclocking potential when operating at 12v (In terms of watts per gh).. if he had his hands on a 9V 10A PSU, I would applaud him doing underclocking tests... and would bit sitting on the edge of my seat to see what he discovered and shared here. mod it up with a silent high flow low rpm fan.. neat!  Thats the mod I want to see...

I'm sure there will be some in depth S5 modding thread(s) coming.. unless this one ends up being it..

Anyway, I'm interested to see where this review ends up in summation and final thoughts..

Don't turn the BBB around.. lol..

I agree with klodike, everything he said.. take a breather.. then I would try swapping the ribbon cables, and pay close attention to the orientation.  move the cable from the good board to the bad one..


Rich

So far this review feels like a bit more of how to fix a broken miner with cooling you would do differently, and how to mod it.

I'm confused about the review thread a bit, nothing personal.. just constructive criticism..  Hopefully there is more to come in terms of testing the default clocks and cooling configuration..

I'm not 100% sure the single fan design is "dropping the ball"..   There was a discussion on cooling designs I read someplace here, and a fluid dynamics engineer chimed in and said that a pull only configuration will always be more efficient than a push pull configuration.  He said Fluid Dynamics Don't Lie.

Also.. you mention the Db of the unit, which is a nice thing to give.. but for the laymen.. it would be nice to get an opinion on the volume of the noise by comparison to other miners..  I don't have a Db meter handy, and if I did, I would probably be forced to try to replicate the Db you are giving with my SP20E to get a subjective understanding of how loud the miner is.

Anyway.. so far it seems that you think in your humble opinion that this miner is a dud, the cooling system is dysfunctional, and it doesnt run at stock clocked configuration so you are going to run it at a decreased  frequency because there is a problem with the stock frequency.   Did the miner shut down at the stock clocks?  did it perform over time as they stated it would in the stock configuration?

Did I miss anything?   I'm just playing devils advocate here trying to flush out a fully rounded review of the miner as it comes... plug and play.. and how it performs as intended.  

I know you want to customize this beast to your liking, but how much solid data have you collected in the way bitmain ships this miner?.  Eh, to each his own.. I know you aren't a dummy.  :-)

I ordered an S5 also.. kinda bummed after reading your thread but still excited to get it... We shall see..

Looking forward to your final conclusion of how the miner performed before and after you had a chance to fix it properly... It would be nice to hear more about the miner in its stock configuration though, and how it performs... unless you are convinced its broken by design.


Rich

My PM is sent as well...

Since its a manual process it wouldn't hurt to follow up with an e-mail to info@bitmaintech.com with the relevant details..

Chips are not much more than the cost of sand if you own the manufacturing and intellectual property.. clearly a growth path to sell miners with more and more chips per unit with low power requirements one the tech is proven to be stable to the community I would think.   It seems like it would be easy to double the hashing output with similar cooling and power consumption when the timing is right for bitmain to do so.

I'm not an EE genius.. but I don't understand why they wouldnt eventually just use different DC-DC modules internally to provide 9v or 12v w/ standard PSU.  Possibly saving that for the next miner with the BM1384?  I also don't fully understand the string vs chain discussions going on..  I guess stringing the chips make other chips dependant on one another for hashing output.. My mind draws analogies to a string of christmas lights where the rest go out when a bulb blows, or running a bunch of hard drives in raid 0 (other drives in the array have useless data with the missing member).  Of course I haven't scoured the discussions on these matters, and have only gleaned over the facts... but there sure is a lot of crazy heated discussion going on.  Anyone have any link backs to messages in this thread or other threads which may help to learn me up.   When I get a minute I'll try to read over the BM1384 whitepaper, I assume it might be the source of a lot of this conjecture.

So far MOST of the bitmain stuff I have purchased has been pretty on point and meets the specs which they claim their miners should meet*, and have publicly and quickly adjusted those specs when they were not accurate..  Ie. Antminer S3 launch 480GH/s -> 441GH/s and even gave refunds for the hashing difference if you purchased when they claimed it would be 480GH/s

(*Its important to note that honesty is good business, but bitmain isn't in the business of charity, you would be lucky to mine back the BTC you spend buying any miner.. so do this for the fun of it.. Don't buy miners to profit.. companies which make miners certainly aren't selling them so you can make a profit.. you WON'T make a profit mining.. Expect 60% of your BTC to come back that you spend AFTER you pay the electric bill. the shrewd miners who do still mine do it for the love of mining and they will sell their equip to recoup and break even, and buy back in on the next most efficient equipment.. even though they know even that isnt the sane investment to make.. The smartest miners probably rebuy their BTC so they are spending fiat not crypto, so at the end of the day they can see some justifiable profit.. even though buying BTC would have been much smarter.. but not nearly as tangible, or fun.)

As far as spondoolies goes.  I love my Sp20's.... great miners.  However the Spondoolie guys clearly overstated its hashing power at 1.7TH.  Honest marketing here would have been 1.333TH/s @ .55J/Gh at the wall...  with overclocking to 1.55TH/s (1.7TH/s being possible but not guaranteed)..  This is the real specs of the Sp20 miner...  And what about those refunds they said they would be sending for slipped delivery dates.. I never got one?  Did anyone?

Anyway.. I can understand concerns with chip failures.. they happen.. and if it takes out a whole string permanantly if a chip dies permanantly.. thats bad bad bad.. but so far every other antminer I have owned (well over 30 so far) have had exceedingly resilient asics... if one did overheat it has always come back after a reboot if it dropped off because of an overclock, and always behaved well when it was clocked at the advertised frequencies... When deployed sanely the built in safeties seem to do their job.. and allow an adjustment to consistently stable operation.

I'm just sharing some thoughts.  

Rich

(Assuming you are having the issue of the miner dropping to 10% (ie. 50GH/s) hashing output after a bit.)

This issues description matches exactly the problem I experienced with the first December firmware I experienced after upgrading..

Why are they shipping new controllers when you could just reflash with the firmware that didnt have this issue..

I had the same problem.. I downgraded fixed the problem straight away..

https://www.bitmaintech.com/support.htm?pid=007201407180243004432lBQW28O0633


From Web Interface: System Tab, Backup / Flash Firmware Tab, Hit "Choose File" under Flash New Firmware Image section, Upload the latest BIN file from the link above.  

Problem solved!  (I assume it was a bad cgminer binary, nothing to get anyones panties in a bunch about.. the S3/S3+ is a very nice miner.)

It will display via SSH w/ putty, VT100, Linux Terminal, xterm, xterm256 color, etc..  common defaults work fine.

I replaced /etc/banner with this and logged into one of my S3's w/ putty (default settings)

https://www.youtube.com/watch?v=E-NqtnyRSE4  

I tried to keep it under 80 columns so it can be used in terminal w/ proper proportions.

Not sure what your usage scenario is...  but if this works  ->  1MftCWPxkBjoMST1rs8Tv4LZiZTq91CByb

^^THIS^^

Oh wait. no I think we got it all wrong.. I know how it works.  Always calculate refunds based on ripping people off... if BTC is worth more than when they paid, refund less than what they paid in BTC, this is fair since the product was priced in USD and not Bitcoin..  However, the exception to that rule is if the amount of BTC being refunded exceeds the original amount of BTC they sent us to begin with.. then just refund that amount.. and even if its store credit.. ask them to send more bitcoins.. they won't know.. bitcoiners are hella stupid..   The only time when we would have to actually refund a customer fully would be if they paid us with that pesky bank transfer option.. I mean because there is like rules and stuff.. or something.

Yup, that's an awesome policy.    I'm sure its gonna go over big with everyone if it sticks..
 

Is the startup asic voltage also the minimum voltage for temperature scaling.. or can it go lower than that?

Even better you could just change the PHP file so that you don't have to keep manually editing  the mg_custom_mode_sp20 file...

Old code
New code

You can find this in /var/www/SP2x/settings.php around line 312 in Sp20 firmware version 2.5.27.. or you could probably just search the file for fan_speed_select.

Yup... I got boned really hard by that  (not because of the repost, I ordered them previously so I could get up and going the day they got delivered) ... 

I'm not sure if I was more upset about the $50 I'll never see again (figured it out after opening them) or the fact that I don't have any quick disconnects on my miner.

Shakes fist angrily at whomever made that post in the first place..   (jk dogie, shit happens life goes on. )

I cried myself to sleep, but then I remembered there isn't any crying allowed in bitcoin mining..    could you imagine? 

Ugh.. WTF..  I looked at the specs of the recommended accessories linked from Bitmain, saw the word "Aluminum" and said great... I'm set.  Why would I assume they would be offering proper accessories?!.

If I can't use silver, can you even use DI with the proper additive? PT Nuke, something else?  I would think the DI is the most reactive liquid possible to use since it is stripped of mineral ions.

What is the BEST thing to use with the lowest amount of maintenance?

I don't believe so.  I ordered the recommended accessories linked from Bitmains Website from http://shop.syscooling.com/goods-45.html

Radiator	AT360 Aluminum Radiator
Material	Aluminum

Should I not use the silver + aluminum and go another way?

Was hoping to make the setup as trouble free as possible.

Liquid Cooling Sucks.. lol

Its actually 2 x S3+

S3+ = 32 Hashing Chips on 2x PCB

C1 = 64 Hashing Chips on 4x PCB