Topic: how much power consumed by each hash board on S7 & S9 (Read 1236 times)

I was being a bit conservative knowing that some folks have damaged the IO board on some miners by using after-market high current (wattage) fans.

Which brings up an interesting question: What blows on the IO board?
With 4-wire PWM fans all of the (high freq) on/off switching of their DC feed for speed control of the motors is done in the fan itself. No power switching FET's needed on the control board. Compared to driving 3-wire fans it simplifies driving them rather nicely. BTW, the s9 uses 4-wire fans for front and back

IF done correctly all the GPIO supplies (or possibly the BB itself) on the blue wire is a low power fixed freq pulse train with variable duty cycle that the fan reads to set the speed. Yellow wire is RPM feedback from the fan to controller to adjust the duty-cycle as needed. Sooo... unless the PCB traces between the +12v feed and the fan plug are just to thin, should be no problem there.

Now a 3-wire PWM fan setup... Different story. For that the yellow wire is RPM feedback and this time FET's on the controller would be handling chopping the power fed to the fan motors. Exceed their current rating and the FETs go *poof*. Worse is that when they fail there is very good chance the gate drive line to them will get hit with all the +12vdc power available and unless properly protected, the GPIO/BB circuits driving those FET'S will most likely also be damaged.

Sounds about right. Only real ways to verify would be to either have a DC current probe or unplug 1 hash board and see what the new power reading is.

so if I/O consume 100W at least that mean each board need about 380W

ANTMINER S9 Batch 5   11,85 THs   + 1600W Bitmain PSU , 230V

http://imgur.com/a/0kO5L

5700 rpm consume more than 50W in usually
S9 need less power than S7 and each 50H lowered from freq can decrease power by 100W

The  biggest power draw from the controller power feed is from it powering the fans. Power specs for the BB can be looked up from anyplace that sells them but should only be 5-10watts. The fans however... Again, look up the specs for the actual models used but I believe each one at full speed draws something like 20-25W.

Don't care what Bitmain says on power draw for the whole miner. My Cyberpower UPS's say an unmodified s7 takes between 1,225 to 1,311w depending on batch. The batch-3 s9 reads as 1,330w. Both using the Bitmain PSU.

Power Consumption: 1172W + 12% (at the wall, with APW3 ,93% efficiency, 25C ambient temp)
https://www.bitmaintech.com/productDetail.htm?pid=0002016081702344625140A58uNg0630

  the reality with 230V is 1235W, not 1172W  with Bitmain 1600W PSU

S9 11.85 consume 1172W for all 3 hash boards and I/O
so i think I/O controller consume at minimum 150W
that mean each board consume about 360W in maximum not 460W

400 to 460 watts at the wall

hi,

how much power consumed by each hash board on S7 & S9
and I/O too