eddy, the temps are not changing very much as my water gets colder.. I think its because I am using 1/4 tubing like I said in my previous post. "cpu temps dont change much" I am using a Koolance pump that does 7 L/Min with 2.6m Head Preassure.. This is on a Core I7 860 4ghz with HT On 1.39 Vcore