I tried messing with the fan settings with no success; The only way I've been able to use my pc right now is to disable the CPU minimum fan speed check, and to plug it into the pump header which causes it to spin at max speed.
However I just solved the problem. With a Bios update. I don't even know how that would even work, but it did. I just upgraded my rig today, and I thought I had updated to the latest BIOS via flashdrive but turns out I hadn't, so I just did that and all of a sudden my CPU fans started kicking in. Did not realize that a BIOS update could affect fans but I guess it kind of makes sense since my old fan that's almost 6 years old worked and the newer ones didn't. Anyways I'll marked this as solved now.