[GuyBFF]

I agree, the Rese pumps are sorta inline (as they don't sit in the water), but they don't have that much power.

Also, resevoirs tend to slow flow as well, as instead of a smooth circulation, you loose a bit of the pumps ability to suck the water around as well as push (and add restirction).

I have no experiance with your motherboard, but is it possible the calibration of the sensor is off (Asus has done this in BIOS before to simulate core temperatures)?

P.S. condensation isn't possible unless something in your system drops below air temperature. (unless there's over 100% humidity / fog conditions in your room!). The air conditioner is probably already removing a lot of humidity. No need to worry.