[ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs

[Biodom]

Interesting observation related to
http://en.wikipedia.org/wiki/Active_noise_control

i have three Sp20 and one S5 in the same room with S5 running with Noctua and Scythe ultra kaze fans (push pull).
I suddenly realized that i have much less noise in comparison when I had just two Sp20 and one S5.
Upon measurement, approximately same amount of noise is coming from each Sp20 at ~69dB and a little less (maybe 64db from S5 with two fans) with all measurements at 1 ft.
However, at the door, just four feet away, the noise already drops to just 61 dB, which is a much faster drop comparing with a single machine.
My point is that most likely some of these miners produce the "anti-noise" (see article).
I set up (accidentally) my three Sp20 in such a way that one is at fan 10 (fixed), one at fan 6 and one at fan 14 (these two on auto).

Right now with all four miners running, I have just 51dB ten feet away and can barely hear them- a great improvement.
My point is that by having multiple machines at the different fan speeds they might produce a canceling anti-noise and the whole setup would be less loud (at least this seemed to happen in my case).

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[Biffa]

which one of those SLOTS labeled as 1,2,3,4 are the slots that power the back chips ?
Thank you !

Slots 1 and 3 powers the two back ASICs on each board

Back being farthest from the fan or closest?

[seriouscoin]

Interesting observation related to
http://en.wikipedia.org/wiki/Active_noise_control

i have three Sp20 and one S5 in the same room with S5 running with Noctua and Scythe ultra kaze fans (push pull).
I suddenly realized that i have much less noise in comparison when I had just two Sp20 and one S5.
Upon measurement, approximately same amount of noise is coming from each Sp20 at ~69dB and a little less (maybe 64db from S5 with two fans) with all measurements at 1 ft.
However, at the door, just four feet away, the noise already drops to just 61 dB, which is a much faster drop comparing with a single machine.
My point is that most likely some of these miners produce the "anti-noise" (see article).
I set up (accidentally) my three Sp20 in such a way that one is at fan 10 (fixed), one at fan 6 and one at fan 14 (these two on auto).

Right now with all four miners running, I have just 51dB ten feet away and can barely hear them- a great improvement.
My point is that by having multiple machines at the different fan speeds they might produce a canceling anti-noise and the whole setup would be less loud (at least this seemed to happen in my case).

My dog has ability to move and see at ultra high speed (at nearly 150 FPS). Thats my conclusion after witness him doge a light spark from my fireworks by bending down and lick his balls.

Anything wrong with my conclusion? Should i test this with a Glock?


PS. you didnt understand jack about sound wave let alone calling something "Active Noise Cancellation". Go to a Cinema, buy all the seats then start experiment listening at every seat.....

[philipma1957]

which one of those SLOTS labeled as 1,2,3,4 are the slots that power the back chips ?
Thank you !

Slots 1 and 3 powers the two back ASICs on each board

Back being farthest from the fan or closest?

the closest to the fan run hottest so they would be the back ones.

this is true due to the fan pulling the hot air from the  asics closer to the pcie jacks (front asics)  those two  get cool air  from the grill by the pcie jacks.

90% sure I have it correct.

[Swimmer63]

Interesting observation related to
http://en.wikipedia.org/wiki/Active_noise_control

i have three Sp20 and one S5 in the same room with S5 running with Noctua and Scythe ultra kaze fans (push pull).
I suddenly realized that i have much less noise in comparison when I had just two Sp20 and one S5.
Upon measurement, approximately same amount of noise is coming from each Sp20 at ~69dB and a little less (maybe 64db from S5 with two fans) with all measurements at 1 ft.
However, at the door, just four feet away, the noise already drops to just 61 dB, which is a much faster drop comparing with a single machine.
My point is that most likely some of these miners produce the "anti-noise" (see article).
I set up (accidentally) my three Sp20 in such a way that one is at fan 10 (fixed), one at fan 6 and one at fan 14 (these two on auto).

Right now with all four miners running, I have just 51dB ten feet away and can barely hear them- a great improvement.
My point is that by having multiple machines at the different fan speeds they might produce a canceling anti-noise and the whole setup would be less loud (at least this seemed to happen in my case).

My dog has ability to move and see at ultra high speed (at nearly 150 FPS). Thats my conclusion after witness him doge a light spark from my fireworks by bending down and lick his balls.

Anything wrong with my conclusion? Should i test this with a Glock?


PS. you didnt understand jack about sound wave let alone calling something "Active Noise Cancellation". Go to a Cinema, buy all the seats then start experiment listening at every seat.....

Just another confirmation of my theory regarding the correlation between low trust scores and commentary that deserves to be ignored.

[Biodom]

Interesting observation related to
http://en.wikipedia.org/wiki/Active_noise_control

i have three Sp20 and one S5 in the same room with S5 running with Noctua and Scythe ultra kaze fans (push pull).
I suddenly realized that i have much less noise in comparison when I had just two Sp20 and one S5.
Upon measurement, approximately same amount of noise is coming from each Sp20 at ~69dB and a little less (maybe 64db from S5 with two fans) with all measurements at 1 ft.
However, at the door, just four feet away, the noise already drops to just 61 dB, which is a much faster drop comparing with a single machine.
My point is that most likely some of these miners produce the "anti-noise" (see article).
I set up (accidentally) my three Sp20 in such a way that one is at fan 10 (fixed), one at fan 6 and one at fan 14 (these two on auto).

Right now with all four miners running, I have just 51dB ten feet away and can barely hear them- a great improvement.
My point is that by having multiple machines at the different fan speeds they might produce a canceling anti-noise and the whole setup would be less loud (at least this seemed to happen in my case).

My dog has ability to move and see at ultra high speed (at nearly 150 FPS). Thats my conclusion after witness him doge a light spark from my fireworks by bending down and lick his balls.

Anything wrong with my conclusion? Should i test this with a Glock?


PS. you didnt understand jack about sound wave let alone calling something "Active Noise Cancellation". Go to a Cinema, buy all the seats then start experiment listening at every seat.....

Just another confirmation of my theory regarding the correlation between low trust scores and commentary that deserves to be ignored.

i don't see anything particularly wrong in my comment, especially since I have dB measurement included. Who is to say that Sp20 with fans at different speed would not produce waves that are out of phase with each other, but I digress.

[bgibso01]

My dog has ability to move and see at ultra high speed (at nearly 150 FPS). Thats my conclusion after witness him doge a light spark from my fireworks by bending down and lick his balls.

Anything wrong with my conclusion? Should i test this with a Glock?


PS. you didnt understand jack about sound wave let alone calling something "Active Noise Cancellation". Go to a Cinema, buy all the seats then start experiment listening at every seat.....

I hate it when I read comments that make me go back and figure out wtf is going on.  All I can say is that I'm glad I wasn't taking a drink when I read this one! 

[lulu2003]

i don't see anything particularly wrong in my comment, especially since I have dB measurement included. Who is to say that Sp20 with fans at different speed would not produce waves that are out of phase with each other, but I digress.

Fan noise is 99+% a random mix of many frequencies that cannot be neutralized by anti-noise as there is not sync or phase.
your db rating were from very different distances afaik.
running sp20 or s5 with Scythe ultra kaze also does not make too much sense for me as that fan is 3pin and not pwm.
next point is the hashrate: downclocked to 900 Gh/s you can make eiter s5 or sp20 down to 40db with 0.3A PC Fans an let them run in a living room.
but at 1200+ GH they got to hot and I doubt you get it under 46db

a little physics:

db rating is not easy to understand.

example: 1 sp20 = 55db ; 2 sp20 = 58db  

doubling (independent) noise sources are always +3db regardless of the distance.

if you double the distance your db gets down by 6 db. if you check that with db meter you'll not always agree, bit this is most up to reflections in smaller rooms.

your db ratings were from 1, 4 and 10 feet. in theory 10 ft. db should be roughly 20db less than 1 ft.

and the "human ear" is recognizing doubled noise in 10db steps but this depends a bit on the frequencies. It's probably a bit less than 10db.

[Biodom]

i don't see anything particularly wrong in my comment, especially since I have dB measurement included. Who is to say that Sp20 with fans at different speed would not produce waves that are out of phase with each other, but I digress.

Fan noise is 99+% a random mix of many frequencies that cannot be neutralized by anti-noise as there is not sync or phase.
your db rating were from very different distances afaik.
running sp20 or s5 with Scythe ultra kaze also does not make too much sense for me as that fan is 3pin and not pwm.
next point is the hashrate: downclocked to 900 Gh/s you can make eiter s5 or sp20 down to 40db with 0.3A PC Fans an let them run in a living room.
but at 1200+ GH they got to hot and I doubt you get it under 46db

a little physics:

db rating is not easy to understand.

example: 1 sp20 = 55db ; 2 sp20 = 58db  

doubling (independent) noise sources are always +3db regardless of the distance.

if you double the distance your db gets down by 6 db. if you check that with db meter you'll not always agree, bit this is most up to reflections in smaller rooms.

your db ratings were from 1, 4 and 10 feet. in theory 10 ft. db should be roughly 20db less than 1 ft.

and the "human ear" is recognizing doubled noise in 10db steps but this depends a bit on the frequencies. It's probably a bit less than 10db.

OK, I get it re frequency. I got less sound somehow anyway and when using a single machine the sound does not drop as fast as you posted (maybe due to reflections). However, you don't have to use a PWM fan. Instead, you can use a 3 pin fan, power it from PSU, then adjust frequency so the machine is not overheating (less than 65C for S5 or less than 115C for SP20).

[lulu2003]

how should I alter the PWM Frequency of a PSU connected 3-pin fan???
And what if room temp is increasing due to mining?

also added new FW point in wish list:

- having some editable user-presets like the 3 fixed from stock, which include the voltages, watts and fan speeds, maybe with a blank field for notes like the estimated hash speed

https://docs.google.com/spreadsheets/d/1EnekOry8kPFKNd-e1VxHVCqrsSwgxppxbr7JLZvsvuE/edit#gid=0

BTW: first test with scheduling voltages did not work for me (tried switch off, value "0", 2 minutes ahead, nothing happened)

[Biodom]

how should I alter the PWM Frequency of a PSU connected 3-pin fan???
And what if room temp is increasing due to mining?

you don't alter the speed of the fan-it would stay the same, but you can adjust either SP20 voltage or S5 frequency until chips are at correct temperatures.
many people here posted about using non-PWM fans in SP20 (and S5). In fact, SP20 has a non-standard connector, so you cannot use regular PWM connector without a rare adapter.

[kendog77]

Guy,

Is there any news on PickAxe? I really like the SP20 and SP31 and am very interested in acquiring more efficient mining gear soon.

I suppose more efficient gear probably won't be out until Spring 2015.

[Guy Corem]

Guy,

Is there any news on PickAxe? I really like the SP20 and SP31 and am very interested in acquiring more efficient mining gear soon.

I suppose more efficient gear probably won't be out until Spring 2015.

Patient my friend.

[Biodom]

Guy,

Is there any news on PickAxe? I really like the SP20 and SP31 and am very interested in acquiring more efficient mining gear soon.

I suppose more efficient gear probably won't be out until Spring 2015.

Patient my friend.

it was spring in TX yesterday-72F/20C...
i don't expect it until the last day of 1H or, effectively, July 1.

[tvasbn]

Also if the new boards will be available in bulk would be nice to know

[tvasbn]

Also if the new boards will be available in bulk would be nice to know

bulk as replaceable boards for SP30 or SP10 miners

[Tigggger]

Guy,

Is there any news on PickAxe? I really like the SP20 and SP31 and am very interested in acquiring more efficient mining gear soon.

I suppose more efficient gear probably won't be out until Spring 2015.

Patient my friend.

Before my vouchers from the SP30 refund expire ?

[bgibso01]

Just wanted to say a big thank you to SP-T.  Bitmain just shot themselves in the foot with their price increases.  Keep being a responsible vendor, and I'll keep buying your products.

[sjc1490]

Just wanted to say a big thank you to SP-T.  Bitmain just shot themselves in the foot with their price increases.  Keep being a responsible vendor, and I'll keep buying your products.

+1

[Biodom]

when is a good time to try skyping support? I don't have good luck so far.