why Temp chip is not identical in all antminer s9 machines ?

beltsniffer

sr. member

Activity: 277

Merit: 250

Quote from: ?? on ??

Hello everyone, I have s9 and temperature in the middle chip is high then other side, can you tell me, I'm afraid about this and what recomend temperature chip can accsept ?!

Is it Normal Process about Temperature ?! Thanks

My s9's always have one board that is hotter than the rest, and from what I have read in the s9 thread it seems a common problem. It has to do with the way the heat sinks are configured and the airflow.

According to Bitmain the chip can operate normally up to 105c degrees. I don't think I would let mine get that high. Maybe 95-100 before I started down clocking or cranking up the a/c.

gt_addict

hero member

Activity: 2492

Merit: 621

Well in that case it must be one of the other things I mentioned in my previous comment. Nothing in this world is perfectly identical. There are many factors why the temps are different. Could be down to the density of the aluminium on that particular batch of heatsinks.

condourfx

newbie

Activity: 22

Merit: 0

Quote from: gt_addict on December 23, 2016, 11:28:31 AM

Different batch of chips, or different amount of thermal adhesive applied by a different worker in the factory. Could just be the fact that one is closer to a cooler air that's coming from somewhere

I also changed the place for each other and same results