it possible to get the PWM to go lower? If i enter 1%, 5%, 10% there's no noticed difference in volume.
noise isnt bad, about equal to an S3 in a warm room, maybe a tad more 'penetrating'. With the cold air from outside, I can achieve good hashrates with a low fanspeed, but if i could get it 20% quieter at the cost of ~200GH I'd be happy to do so.
Without the cold air from outside, low-rpm is far from sufficient if i am tageting a 55-60C operational temperature
20C (ambient) = 3.6TH
10C = 4TH
5C = 4.3TH
0C = 4.6TH
-5C = 4.8TH (and 0.011% errors, havent pushed further yet)
It is possible to go lower than 20% PWM with my modified bitmain_spi file :
The only modification is that it can go to 10% min instead of 20% min. (You still need to set the fan percentage to what you want : example 18%)
This allows to effectively decrease the noise from the s7 (totally silent if set at 10%) if you are in a very cold ambient temperature or if you downclock the frequency seriously
It should not be used if the temperature is > 70°C. Check that the stop miner when temp is over 80°C box is checked in the configuration page.
Download here :
https://mega.nz/#!8BUVVa7K!pSyaXVVjxfkthPdgJUSabKQQaRiVi1s6-zct5Ob32iMThe original is here if you need it :
https://mega.nz/#!MctVRR7D!lEEb0NvQQNtAemzYNawEAtp8qMVi75dxOLqwNFqv7ToTo use it :
scp bitmain_spi_s7_fan_10.ko
[email protected]:/config/ #Copy the file to the miner
then ssh to the miner :
ssh
[email protected]then :
cp /lib/modules/3.8.13/kernel/drivers/bitmain/bitmain_spi.ko /config/bitmain_spi_original.ko #Makes a backup
cp /config/bitmain_spi_s7_fan_10.ko /lib/modules/3.8.13/kernel/drivers/bitmain/bitmain_spi.ko # Copy the new file to the good place
/etc/init.d/cgminer.sh stop ; /etc/init.d/cgminer.sh start #restart cgminer
The modification will be gone if you restart your miner.
If you want to do it again after a restart you only need to do the two last command :
cp /config/bitmain_spi_s7_fan_10.ko /lib/modules/3.8.13/kernel/drivers/bitmain/bitmain_spi.ko # Copy the new file to the good place
/etc/init.d/cgminer.sh stop ; /etc/init.d/cgminer.sh start #restart cgminer
If my new binaries help you and you are satisfied, consider helping me by sending some bitcoins to my address:
1NfUptoShEtSD2SQV2f45Xr1bTysFnsHiU
Warning: Do nothing you don't understand ; No warranties whatsoever are given by me ; this could not work or be useless ; this could burn your S7 or make it useless ; this could void your warranty with bitmain.
It works! looking at the two files, seems the difference is 2-3 hex values that are modified. The method provided above works, but heres the easy way for those on windows:
CAUTION: comparing the modified file against the original THAT WAS ON MY BATCH 8 shows a large number of differences, as does comparing my original with the "original" file uploaded above. The vast majority of changes seem to be incremental hex values: 4F becomes 4E, 83 becomes 82, 9A becomes 99, etc. not sure why though
SOLUTION: using a site like www.diffnow.com, compare the existing bitmain_spi.ko file with the modified one provided above. If there are only 2-3 changes its safe to change. If Its a batch8 system, Ive made a modified file here: https://mega.nz/#!wAcA3SrZ!2cVcpIR4qjJY2xmFvRREOMlVYFLk6YtzIxQNteGdWe0 (works to 10% fan, and with this the system runs fans at max when changing settings, as it did when stock) (based on this original (S7, B8): https://mega.nz/#!kYdC2bTD!kcBid6lMeN9ygYxJ2sprMhRBmDJ-bwaBO3ldZPCHWiU)
1) download the modified file above.
2) download and run winscp.
3) connect to miner (SCP mode, port 22, root/admin). navigate to folder: /lib/modules/3.8.13/kernel/drivers/bitmain/
4) rename bitmain_spi.ko to bitmain_spi_original.ko
5) transfer the bitmain_spi_s7-fan_10.ko file to that directory, and then rename as bitmain_spi.ko
6) login to the miner's webUI. change fan setting there and "save&apply"
Not sure if changing it this way will survive a reboot, but the process is simple to repeat.
OPTIONAL:
7) copy the bitmain_spi_s7_fan_10.ko file to /config/bitmain_spi_s7_fan_10.ko
if modifications are lost on system restart, SSH in and type:
cp /config/bitmain_spi_s7_fan_10.ko /lib/modules/3.8.13/kernel/drivers/bitmain/bitmain_spi.ko # Copy the new file to the good place
/etc/init.d/cgminer.sh stop ; /etc/init.d/cgminer.sh start #restart cgminer
interesting sidenote, when changing settings in the lanfeusst version, the fan goes quiet, then spins up (before it went full blast, then reduced speed)
Nice
I guess you did the modification for the new firmware dated 2015-12-11.
My S7 Batch 1 was with the 10-23 firmware that is why there is so many difference between our 2 files.
That also means they finally fixed the burn to death issue with auto on the december firmware. Since it will now go full blast if it loses internet connection instead of going to 20% before on auto.
The sound is natural to an with such high rpm and airflow, dissipating 1200W+ in a short tube. The SP20 was equally loud, almost worst at full speeds, most people had to run it <900W if they wanted the fans to spin at a LESS-loud speed. same for gear like the S5, SP10/SP3x
With the software tweak to get fans <20%, noise is actually quite bearable. I have them machine fed 0C outside air, so can keep the volume down without much issue.
20% fan @ 4.7TH with 62-67C temperatures (board 3 is hottest?). noise is as good as the S3
17% fan @ 4.5TH. noise is totally acceptable to be in the main room
15% fan @ 4.3TH. quiet. similar to a game console or desktop computer that has loud(ish) fans
Happy to see you can enjoy nice silence now.
?
WEll maybe there is any possible way to declare it as a... beer boxes?:-)) Man i wish you pay as low fees as possible, my old rig few years ago almost doubled from it's initial price after passing customs(((... 