I'll try disabling each fan one at a time as you suggested. However, I did connect the fans using an extender to the cooler (not sure if this is a factor).
I believe I did stop all three fans the other day and the system was whisper quiet. It's just I didn't check each individual fan. Also the side of the radiator where I have the ML fans attached to, there are no washers and the side with the LL fans - there are washers attached (can't remember why I did this).
Unscrewing the fans - if it came to that... would I then have to remove the cooler off from the cpu and clean the thermal compound and reapply? I'm just assuming there won't be much room to get away with just removing the fans.
I'll be sure to update you once I'm home early next week. Thank you for the advice!
I'll try disabling one fan at a time using the corsair software to determine which fan(s) are the root cause. Not too keen on replacing the fans at this current time since I've already spent a lot of money on the system thus far. I'll update you once I return home early next week. Thank you for the info!