Pump pulling from CPU does it make a difference?

[nikhsub1]

So pressure drop over a component is not just a function of flow, but also pressure at the inlet of the component?

Im not sure I understand your question. What I was trying to say is that pressure drop of a component is dependent on the pressure of the pump. If you use pump A with an EK Supreme it will have x pressure drop. Now, if you use pump B (which we will assume has 2x the pressure) the EK Supreme will exert MORE pressure loss with pump B and with pump A. How much more? Roughly 33% more (if the pressure is doubled). Pressure drop of a component is dependent on the pressure it is receiving and the resistance of the component itself. Pressure, flow and PD are VERY complex things to properly understand as there is no fixed target, values can change depending on many factors. What Vapor was saying is that no matter the position in the loop, each component will receive the same pressure and that is incorrect.

Edit* A quick way to demonstrate how PD increases with pressure; if you have a can of air (dust off, etc) take the red straw and blow though it gently. Now, blow as hard as you can. Notice the harder you blow the more resistance the straw makes? Same goes for water.