Then why now they showing us the chip temp. Why is that important now? Poor design?
My pcb temps are running 56, 56, 59 at 625M. On any other Antminer I would say there is plenty of room for some over-clocking. Or in this case to move to the default 650M. (EDIT)
Chip temps are 87, 86, 91. Are these temps higher than an S7 with the above pcb temps? In other words is there more of variance on this miner than the older ones. Where we can burn out a chip before the pcb gets to 80C. That's still the safety shutdown temp. I believe.
Inquiring minds want to know.
PCB temps are useless...just a cheap way to guesstimate what the die temps would be. My guess would be that with more real-estate afforded by 14/16nm it became worth it it put temps sensors on the dies, and the fact that chips at these node levels are more sensitive to high temps. Anything over 90c continuous on die temps will shorten the life of the chip. I would be concerned if they are running over 80c.
if 80c on the chips is bad then the s-9 should be clocked at 575 vs 650 as to go to 79c will not be easy in rooms without ac.
i went to 625 but may indeed go to 600.
mean while i fixed the mad whistle
https://bitcointalksearch.org/topic/m.15223731
https://bitcointalksearch.org/topic/m.15223315
I take it that the filter doesn't block that much air flow? I'm going to have to pick some of this up for my S7 that still whistles once in a while.