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Author Topic: Antminer S7 - Vertical vs Horizontal orientation  (Read 1523 times)
Finksy
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October 26, 2015, 04:25:02 PM
 #1

So I thought I'd test Strato's idea out with the S7 to see if there was any appreciable difference between horizontal or vertical orientation on a wire rack.  Turns out there was:

S7 #53 Horizontal Orientation:
Mean board temperature: 57.66*C

S7 #53 Vertical Orientation:
Mean board temperature: 53.66*C

Temperature difference of -4*C by going vertical

S7 #54 Horizontal Orientation:
Mean board temperature: 58.66*C

S7 #54 Vertical Orientation:
Mean board temperature: 55*C

Temperature difference of -3.66*C by going vertical

Both S7's were side by side without any obstruction to the intake or outlet.  Ambient temperature is around 25-28*C.  There was no box fan blowing on the intake like in Strato's S5 setup, though I would like to get one and try higher clocking. I don't actually own 54 Antminer S7's, it was just the sequence after S3's, S5's, etc.

I'm not saying that this is conclusive based on my huge sample size of 2 miners, but I'd love to see others try it out and report their findings if their space allows it.

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Finksy
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October 26, 2015, 11:14:42 PM
 #2

Oh, and I had them at opposite positions during testing (#53 vertical while #54 was horizontal, etc) to try to eliminate environmental factors as the cause, the screenshots were also taken at the same time of day, one of them 24 hours after making the switch, the other one was 3 days later.

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Prelude
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October 26, 2015, 11:38:39 PM
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To be expected considering heat only wants to do one thing in life - rise. Thanks for sharing your results.
OrientA
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October 27, 2015, 04:33:55 PM
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This experiment proved that the heat will go up. Well done. Is it practical to position the miner vertically? Maybe it is OK for a few, not feasible for mining farms.
Finksy
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October 27, 2015, 05:45:17 PM
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To be expected considering heat only wants to do one thing in life - rise. Thanks for sharing your results.

True, but air speed minimizes the effect of natural convection from my understanding, and with two fans humming at 4200RPM I wasn't sure there would be much of a difference.  My experience was there is.

Can't wait to put a fan under and try some over-clocking.

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torepia
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October 27, 2015, 07:40:17 PM
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To be expected considering heat only wants to do one thing in life - rise. Thanks for sharing your results.

True, but air speed minimizes the effect of natural convection from my understanding, and with two fans humming at 4200RPM I wasn't sure there would be much of a difference.  My experience was there is.

Can't wait to put a fan under and try some over-clocking.

Low temp's will not help you when overclocking the S7, it thrives at 50+ ^^ What you need are PSU's with 12,2+V output.
kingcolex
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October 27, 2015, 08:37:49 PM
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To be expected considering heat only wants to do one thing in life - rise. Thanks for sharing your results.

True, but air speed minimizes the effect of natural convection from my understanding, and with two fans humming at 4200RPM I wasn't sure there would be much of a difference.  My experience was there is.

Can't wait to put a fan under and try some over-clocking.

Low temp's will not help you when overclocking the S7, it thrives at 50+ ^^ What you need are PSU's with 12,2+V output.
I am confused on what you are saying, the higher he overclocks it will definitely go past 50.














 

 

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VirosaGITS
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October 27, 2015, 10:52:10 PM
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I don't know if this worked only with S5 because they were mostly open heatsink, but if you put your miners vertically, a user had a boxfan blowing air upward from beneath, did a big difference. Even horizontally, i have a box fan blowing air with the air flow and it does a huge difference.

Would be interesting to see if it work with S7, if it does not, then that mean the positive air pressure doesn't really help the internal air flow that much.

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dance191
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October 28, 2015, 06:30:55 AM
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Did you try them with 1 horizontal and 1 vertical, take the temp readings and then flipping them (horizontal becomes vertical and vertical becomes horizontal), then take a second set of readings?  You know, to control for if maybe the vertical reads low and the horizontal one reads high?  If the same miners did both positions I think it would control for that...

Overall, nice idea!
torepia
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October 28, 2015, 08:26:48 AM
 #10

To be expected considering heat only wants to do one thing in life - rise. Thanks for sharing your results.

True, but air speed minimizes the effect of natural convection from my understanding, and with two fans humming at 4200RPM I wasn't sure there would be much of a difference.  My experience was there is.

Can't wait to put a fan under and try some over-clocking.

Low temp's will not help you when overclocking the S7, it thrives at 50+ ^^ What you need are PSU's with 12,2+V output.
I am confused on what you are saying, the higher he overclocks it will definitely go past 50.

I'm saying that the chips will hash more at +50C operating temp, compared to +40C, at ex. 600Mhz. At least thats my experience.
Finksy
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November 02, 2015, 02:46:15 PM
 #11

Update:

Kept the two S7's vertical, running a 637M clock and still at or under ~60*C board temp. HW errors are negligible.





Anyone else see if there was significant difference from running it vertically?

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jds1119
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December 26, 2016, 09:04:10 PM
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Do you have any images of how you mounted them? For me its not and issue of get the miner vertical but where do you position the PSU especially when you use the bitmain one with not much slack. If anyone can attach links to other post I'd appreciate it
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