Pump pulling from CPU does it make a difference?

[prava]

Let me get this straight: so the best way to go for RL is still "do the shortest loop possible"? If I got what Martin said, it would mean that as Flow rate is constant throughout the whole loop, if you put a thinner tube you would have more velocity (but less...what? something has to decrease, nonsense otherwise) but nothing else and that's why a high restrictive block (normally jet-based) gets better performance, just because itself makes the water flow faster. Yai, this doesn't make much sense in my head at the moment, I admit. Pressure is force/surface, flow is liters (or gallons)/second yet what is speed in therms of water? The speed of each particle? I can see that with a different tubing you can change the velocity of water, yet I've got no idea how to quantify it....