Quote from: notey on March 30, 2015, 06:29:54 PM

Quote from: Terra Hash on March 30, 2015, 05:58:11 PM

Quote from: notlist3d on March 30, 2015, 05:33:09 PM

Quote from: Terra Hash on March 30, 2015, 03:51:43 PM

Hello everyone. I'm a CoinTerra refugee and new to the Spondoolies camp. Just got an SP31 up and running over the weekend.

I can't seem to find any definitive explanation for setting the "Fan Speed" parameter. The documentation says the fan speed affects the unit's hash rate. But is the effect of fan speed on hash rate direct or consequential? That is, is the fan speed setting directly used in setting the ASIC clock rates, or does a faster/slower fan simply mean cooler/warmer ASICs that subsequently mean faster/slower hashing?

The reason I ask is that my miner is in relatively cold (60F) server room and the chassis temps are holding at 21C front and 59C/59C rear. So I was wondering if it's possible to devote less PSU power to air movement, and more power to the ASICs by reducing the fan speed. Or is such an endeavor a fool's errand?

Any sound (pardon the pun) advice on the matter would be greatly appreciated.

This might be a little off topic I appolgize. Just wanted to warn you that you might want to switch names before you go to far. Terra Hash was a scam bitcoin maker that ran off with pre-orders. So if anyone googles your name it has TONS of bad PR.

@notlist3d: Thanks for the fair warning. I'll be sure to have my flame suite ready. But I can assure you I AM NOT THAT GUY!!! I'm just some dude down in Mississippi trying to mine a few coins. My TerraMiner IV units suffered premature deaths, so I made scrap metal out of them and moved to Spondoolies.

Hi. I run 10 of the SP31s and here are some of my settings.

Most quiet, my most efficient setting: Fan 40 then .64 .64. .67 and PSUs to 750w each. This should equal about 3500 ghs. At this setting, my AC units are louder than the miners.

For about 4,000 ghs: Fan 60, .65 .65 .70 and PSUs to 925w each.

I have other settings above this, but these are the two lower settings that I most often use, especially if the miners will be unattended. Please keep in mind that these settings may not work for others and are based on my cooling/ventilation setup, etc.

Hope this helps a little. I have seen little fluctuation in hashing rate with fan speeds, more so with PSU voltage limits.

I'm running 5 units, all currently with identical settings. It's a mixed bag on performance. The temps are all very close, but the hash rate varies amongst the units from ~4000 to ~4450. I was hoping for a bit more consistency but this may normal. I'v also got one unit where ASIC#1 is totally DOA from Spondoolies-Tech. Not really sure what to do about that.

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