Well that turned into something unexpected , but it all helps.

If your Canadian winters can't cool the units then it's saved me bothering to even try and test these tomorrow, i'll drop them in the room and put them back to auto.

Not so surprising is moving the fans back to auto after doing the firmware upgrade temperatures are down and voltage it up.

As for the mining so they were bought for bitcoin, it was my looking into something i should have left alone until i at least understood the basics of what these do.

Learning in public can and is appearing to be painful..