[KnightElite]

I doubt you've got much additional heat coming into the CPU from the other components... as you know heat propagates from warmer areas to cooler areas. It seems much more likely that as the flow increases, and the waterblock cools better, secondary cooling paths (through the pins and the motherboard, etc...) become less important, because of the higher delta-T between the block and the CPU die.

Also, all the other components should be generating a constant quantity of heat, given that their cooling is not changing at all during the entire process.