First I do not use an XP processor and second my sensor is very accurate on the mobo. As it was check with a Fluke meter with its probe mounted to the underside of my processor. So we still disagree.
Oh and by the way I did check the system before and after with the Fluke meter with the probe in the flow of water and again no temp. changes either. This was done using the T which is inline and sliding the probe into the Silicon tubing until the probe was in the flow of water. Peace