H80i noise and temperature mis-match

I installed my H80i the other day, and it seems to be working alright, aside from the noise, that is. The fans are noisy, and even when I unplug all case fans, the pump makes what I can only describe as an electrical buzzing sound.



Another problem I'm having is the temperature readings in LINK.



If I'm not mistaken, the temperature of the H80i and the CPU should be the same, right?