Aquarius 2??

I have a gigabyte m/b AMD 2400 AquariusII cooling

temp is 21c
why dose it state this in sisoft sandra but using the easy tune 4 gigabyte software it is 47c /system 36c

I am using the
http://www.thermaltake.com/products/AquariusII/aquariusII.htm

Also has anyone tried putting the water reservoir/pump in a fridge?

its more of a quiet soloution, but you can get it at upgrade, or get all the parts seperateley like i did