so, status report of boards:
1 of 4 is rock stable, no problem at all
1 of 4 is working on 400G, but it is reseting:
[2014-09-30 11:45:32] HEXM 565 Chip[2] 16 consecutive HW errors reset
[2014-09-30 11:48:57] HEXM 565 Chip[3] last received nonce 6 secs ago reset
[2014-09-30 11:49:00] HEXM 565 failure, disabling!
2 of 4 has only half working chips - at 200G is unstable (reset few times in hour and then got to ZOMBIE). At 100G it is working relative ok, but only 1/4 power of 400G :-((
marto, do you want try the two bad boards with remote ssh? or should I sent it to you to RMA?
I was having the same problem with 1 of my boards. I tightened all the heat sinks and checked temperatures and it still didnt help. Then I lowered the clock without lowering the voltage and it stopped the resets. If I remember correctly, my boards are currently running at 860 clock with 780mV and are quite stable, but only doing about 340GH/s each. I just tell myself that it is more power efficient this way.