What was Canaan's official statement on how cool these should be running?
Right now I can easily keep mine cool Temp:16 / 67 Fan: 3960RPM / 62%
but in the summer......
Shouldn't be a problem. I have ran the avalon 741s for almost a year now and not a single one has failed.
when I got my 821's I sent Canaan an email as I found a couple of issues which they since fixed in the controller firmware.
One of the questions was about heat.
The new ASIC's are NOT like the old ones, they will not tolerate high temps. Yesterday I decided to look at the Avalon8 code in cgminer and same with the 821's. The fan will moderate (or more likely max out) to maintain 70C. Anything hotter will run that fan at 100% and runs the risk of damaging the ASIC's. This is what was returned in my email from them as well.
While the fan moderation temp on the 741's was 90C (in the source code), it's 70C in the 800 series miners. My recommendation is to *NOT* allow them to run for any length of time over the low 70's. But that's just me
But 90 for any length of time, I'm very sure will be utterly destructive to them.
