Quote from: dmwardjr on September 24, 2015, 09:57:20 PM

Quote from: MinecartCoining1831 on September 24, 2015, 09:39:33 PM

Got my S7 today! And my first post

Been running for a couple hours and getting almost exactly 4.86 TH/s at default 600MHz...and has not had a single HW. It is using more power than I expected. I have it connected to one Antec HCP-1300 Platinum and it is showing 1,350watts with a Kill A Watt meter at the wall. The brief info card that came with it also said it uses 1,210watts and would use about 1,400watts at the wall with a standard server power supply. Wasn't it supposed to be 1,210watt at the wall with a 93% efficiency power supply? I was expecting about 1,250watts at the wall with my Antec HCP-1300 running at around 90% efficiency.

The red light is also blinking on the miner. Not sure how to figure out what the issue is, as it is hashing at expected rate as shown by the miner and the pool. I'm thinking maybe a fan problem. Without manually changing the fan speed, Fan 1 is always running at 4,560 and Fan 2 always runs at 3,120. Temp is 58-60c for all three boards in 23c ambient basement. When I try to manually set the fan speed, it doesn't change much. At 50% the fans run at 4,000/3,000. At 80% it is 4,200/3,120. My S5s work as expected when I manually adjust the fan speed.

It would be interesting to see others adjust their fan speeds as well to see if both fans are close to the same RPM's or if they are substantially different as yours are. AND to see if they also have the red light you are speaking of.

I believe the blinking red light is described in the Kernel Log as "error_fan 4, normal_fan 2, fan_num 1". This error was showing up every 10 seconds in the log, but seems to have spontaneously stopped for the last hour and the red blinking light is off and now the normal green blinking light is on. I still think the miner is pulling too many watts. And I'm curious if others have the large difference in RPMs between the two fans. I described the issue to Bitmain in a support ticket. We'll see what they say.