Turned out that a Nouveau driver was loaded when I installed Mint. Long story short, the fan that was maxed out in Mint was the Nvidia GPU which I didn't see pop up in sensors-detect at all. What it did show was something that initially confused me - a nouveau device which it couldn't get any information on. After I ran pwmconfig, I was able to see some of the fans, but not the Nvidia GPU. I installed xsensors and it was able to pick up all the case fans and the CPU and they were running at relatively low speeds (it is cold in my room). I saw the arch linux thread and did install lm-sensors but sensors-detect had difficulty seeing any fans at all though it did give me the core temps.
I have to lower the threshold to 300 to boot anything. That said, every time I lose power, the bios resets to alarm if the fans are lower than 600 rpm which appears to be the default but the fans are always turning much slower on a cold boot. Thank you ClixTrix - I do let bios control the fans.
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