How often should an S9 be shut down and dust blown out of it with compressed air, if ever? I know it would depend on the environment it is in, but say in the average house.
Just wondering if anyone cleans thier out, or if you run them hard and let the dust bake on?
I am also wondering why people seem to think that you cannot run an S9 on 120 volt? I understadnt that the power supply puts out less watts when on 120 volt as apposed to 240 volt. Just wanted to get peoples ideas on if they should be run on 240?
Mine draws 12.6 amps at 120 Volt, about 1525 watt
The miner itself runs on DC from the PSU.
220/240 is preferred for many reasons.
One of which is because it pulls half the current of 110/120. Half the current means half the heat, and warm wires are not your friend.
Also, the average US residential circuit is 15A. You shouldn't run at > 80% of the capacity of the circuit for an extended period of time. 20% of 15A is 3A, so you shouldn't be running over 12A on a 15A circuit. If you have a true 20A circuit, that is sized properly from breaker to outlet, you're probably okay. Otherwise you're asking for trouble pulling 12.6A 24/7.
Furthermore, if your circuits are sized properly, you can run 2x the equipment at 220/240.
Lastly, 1512 watts is 1512 watts, whether it's 120 * 12.6, or 240 * 6.3.
M
Yes, I understand the math of VxA=W
What I was wondering is that the PSU ( Um yes DC I Know) the PSU max DC output when input when it is on 120v input is 100 Watt 12 volt DC output, and i think 130 watt or 133 watt when input is 240. Does the S9 need that extra bit of 30 watts? I have had mine running on 240 as well, and I seen a slightly higher hash rate, but that could of been due to the temp being lower in the area that I had it running. went from 20 deg ambient to 5 deg ambient when it was on 240.
The New nomex 14/2, 90 deg C that they use in residential now is actually rated for 25 amps. The breakers used are 15 amp. I believe this was due to the OLD wiring being rated for only 60 deg C which made it rated for only 15 amp.
** Note: I am refering to the Bitmain PSU.