Today I added a Delta AFC1212DE which has 148cfm at 3900 rpm which is being run through molex so it's going full speed. I also have a second fan running in a pull configuration at 1800 rpm. But for some odd reason Row 1 is 58 degrees and row two is 44. There is A LOT of air being pushed and pulled through this miner, why is one side way hotter? Should I RMA? I've only been running it for 5 days. I should also add I'm running it at the stock 350 setting. So no overclocking. Also the temperature in the garage is 58 degrees Fahrenheit / 14 degrees Celsius.
EDIT 1: It has now started restarting mining every 7 minutes or so. It will be at 1Th then all of a sudden drop to 0 and then start to climb back up. There are no X's.
As others have said, nothing wrong with the temp delta between the two boards, its quite common and a product of a not very accurate measurement system. It does what it needs to though. What power supply are you using, the controller rebooting rather than blades dropping or X'ing is rather uncommon.
I can't remember the brand but It's 850W Bronze. That should be more than enough right?