Topic: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs - page 174. (Read 1260290 times)

I tried many % ... 30% seems the sweet spot. Otherwise, I still heard the sound wave and i can't handle it

How exactly is schedule supposed to work?

I set it to lower the voltage in 10 minutes for example and nothing happens when the time is up.

Current firmware version: 2.6.10

ssh to the unit and edit (vi) /etc/mg_custom_mode
It has fan setting.
Set it to 31, or 27, or whatever )

if you are going to chop off the connector anyway, then this is the best deal $$ wise (two for $20 with nonstandard connector)
http://www.ebay.com/itm/Delta-AFB1212SHE-Computer-Case-Power-Fan-120X120mm-Lot-of-2-/191472588964?pt=US_Computer_Case_Fans&hash=item2c94a7d8a4

if you want with standard PWM, then
http://www.ebay.com/itm/Delta-AFB1212SHE-PWM-120mm-x-38mm-4Pin-PWM-Hi-Speed-3700-RPM-151CFM-Case-Fan-/231318294284?pt=LH_DefaultDomain_0&hash=item35dba50f0c

or

http://www.amazon.com/Delta-Electronics-AFB1212SHE-120x120x38mm-connector/dp/B004Y1HLA8/ref=sr_1_8?s=pc&ie=UTF8&qid=1422465408&sr=1-8&keywords=delta+120mm+fan

these fans use 1.06A

thanks!

I would like to try a 38mm PWM Delta, but I doubt they will be quieter than the 1amp "JDH1238B" (also 38mm) I took from the S3.
These bigger Deltas are most commonly server fans with high cfm and they don't care about noise.
If someone can point me to a 38mm PWM 12V Delta with not more than 1 to 1.2 amp, I appreciate.

the probably 1:1 fitting connectors 1.5mm spacing (I posted an ebay link) are still on the way from china to me, because I could not find another source.
In the meantime I cut the original fan wires and inserted a standard fan connector, only way not to touch the controller board.

i think if you could wire a PWM connector to the SP-tech connector you could turn it into an adapter.

Great data, and very useful, maybe I will try Noctua on Sp20.
However, this is not the delta most people use. This one is 25mm vs more typical 38mm, but has the advantage of being quieter.
However, i am not sure how did you get PWM working on SP20.
Did you get an adapter for the non-standard connector on Sp20? If yes, please post a link to it.
Thanks

I got my Delta AFB1212SH fans (0.8amp) 15 minutes ago and it seems they are the right  ones for underclocked mining in winter time?!

only speaking of PWM fans, because fan control is a MUST in my opinion.

best fans before I tested were the 1amp fans from Antminer S3. they are very okay at 50% and below.

I did a lot of measurements in the past 1-2 weeks I try to sum up:

PWMs tested:

- sp20 original 2amp: very noisy, high CFM
- bitmain s1 1amp: lot quieter at low pwm%
- bitmain s3 1amp: even quieter but only at low pwm%
- noctua 3000 0.3amp: very quiet at low pwm% but not enough CFM for >1200 GH or summer time.
- some case fans like artic F12 0.3 amp and below claimed 80 CFM never ever, only okay for below 1000 GH
- Delta AFB1212SH fans (0.8amp): best up to now


I did db testings roughly 2 meters distance
my server PSU is not the quitest, it adds at least 44 db, I think PC PSUs with 12mm fans are better.

highest rating was sp20 stock fan at 68


all tests in room at 22c ambient


I doubt that air cooling will be less noisy...keep in mind that for extreme conditions you need fan cooling power, probably that 2amp, and this is noisy.

may be stacking 2 Deltas may be an option to try for some more cfm???! there is room as they are only 25mm compare to 38mm depth like stock and bitmains

Philipma1957 poll is back: https://bitcointalksearch.org/topic/m.10280044, despite Dogie's wrong doing.
Thanks to Biffa

I have my doubts: https://bitcointalksearch.org/topic/m.10289670

Cable ties are your friend

Thank you both!!!

There are significant challenges to a watercooled SP20.

Primarily, I'm too busy to set it all up.

Not with our 2nd gen hardware.

Doesn't matter his response, what matters is: is there any chance of watercooled Spondoolies miner?!?!?!

This will be interesting. Can't wait for Dogie reply 

Which other issues do you think the SP20 has that would cause decreased density to not allow it to become silent?

'Dual sided' PCBs don't play well with blocks as you'll have to make either a really weirdly shaped one for each board or individual ones for each chip. And then you still have the problem that those board components require airflow, which they won't get due to the jungle of waterblocks. Would be interesting to see but I think a different layout would be easier to work with.

And would a $600 SP20 still be awesome if its water cooled? Adding in watercoolings ads in costs across the board unfortunately.


I agree with the sentiment on spreading chips out, in every product other than the SP20 though. The SP20 has other issues / coexisting hurdles required to get it silent at stock speeds which wouldn't necessarily be solved with a decrease in density. On the SP10, SP30, SP31, SP35 though, almost certainly. Of those only the SP10's fans were actually loud, everything else was PSU noise from using 1U PSUs.

Not necessarily. If they use the Intel/AMD spacing and sell it without coolers. Similar to the Habaneros and some of the KNC (IIRC). That would allow us to use coolers we have "laying around" or source locally and actually would reduce shipping costs.

I wonder what the comparison of the shipping size/weight/cost of changing the specs of a SP20 to run cooler would be compared to adding the weight of water blocks, tubing and radiators to the box? More if its a sealed system with included liquid.

^very true. unfortunately the shipping size/weight=cost would be about 50% more. In any case the SP20 is quite reasonable when its running at 1200GH or less.