I buy 14AWG cables in bulk from China. I have a company that will custom make any cables I need, I dont order them from normal distributors.

The 54 chip boards have stock frequencies of up to 650 depending on the batch. (650mh makes the miner run at 5.67TH, they only ever had internal batches like this and none released to the public. ) I would probably not push the machine that hard if you want it to last for an appreciable amount of ttime.

Another thing of note, while you do have one board running hotter than the others, even that board is so far inside the safe range I wouldnt even question it. These boards will run to 80c before shutdown.

I have been trying for months to get help setting up their new version of AMS. The instructions from their own github are incomplete and I have yet to receive a single answer in their official IRC support channel.

The APW3 is a terrible power  supply. In large bulk orders I have seen 30%+ failure rates. You need to verify the PSU is putting 12v out of the power plugs. Just because the fans running does not mean the PSU is actually putting the power out.

The temperatures are pulled directly from the hashing chip, normally chip #45 the last in the string. Outside of replacing that chip there is not much to be done.

Have you verified the PSU is working properly?

Jump the turn on pins and test the leads with a multimeter to make sure it is outputting power properly.

you shouldnt be mining ETH with this anyway

So looking at your screenshot your RPi is not seeing the AUC adapter that goes inline between the RPi and the miner. Until you fix that part, your Avalon will never be seen.

In the CGminer status page, just under the pools section you will see "Avalon Devices" This is where you should see your AUC adapter, if you do not see the adapter there, you have a cabling or an AUC problem.

Which AUC controller do you have? The smaller shrink wrapped version or the one with the hard plastic outer shell? They react differently so it is important to know which one you have.

You will want to run them on a separate controller anyway. If they are all on the same controller you can never update the MM firmware because it is miner specific and the update process happens to all miners on the RPi at once, there is no way to selectively update.

Mining on laptops is a bad idea.

Posting questions for altcoins in the bitcoin section is also a bad idea.

This is mining support for bitcoin miners. Please post in the proper section.

The others are failovers, you only need 1 as long as it is functional.

All this message means is bmminer is not running. It its not an error or a problem. This is the expected functionality if your machine is not hashing.

Yea heat in general rises but you will be dumping out much more heat than that natural rise can account for. On days with no wind you will still heat soak the general area. Ducting it to dump elsewhere is an idea but the landlord might not want a steampunk looking warehouse.

HW errors are totally normal and nothing for you to worry about unless you are seeing tens of thousands in a short time.

Heres an example of one of my machines with a 40 day uptime:

Even the 'mining' boards really dont have anything special in the BIOS. Just look at tutorials for setting the BIOS up on other boards and you should be able to figure out what settings specific to your board you will need.

10.5

If your machine is fully shutting down there is some other problem. Most likely a PSU issue.

Your last post mentioned 105F and 60F as the temp ranges. I think thats the confusion.

If you are exhausting on the same side as your intake you will just be drawing hot air back into the facility and defeating the purpose of the fresh air intake. I have tried a setup like this before and it did not work so well. Cant you add fans and hoods on the roof to exhaust the heat?