Those numbers were for example only.
All pump's have a swing.
this swing starts at the same elevation as the pump. This has a value in GPH or GPM depending on manufaturer.
from there as you raise evelvation from said pump the swing starts to drop that value as the pump has to work harder to get the water to that elevation.
You could argue that flow rate is important with blocks designed for high turbulance.
These blocks thrive on high flow and high volumes of water. The disapation of heat energy across a rad is often times better with slower flow rates holding the water in the rads longer for better heat trasfer in that part of the system.
so if you are pushing 300 GPM through the block and the temp of the water coming out of the rad is higher than your input water to the CPU you can play with flow rates to maximize what ever the system you have. This is one nice feature about varible speed pumps. If it is colder then you could increase the flow rate for max turbulance at the block for better heat transfer at that point....
Sorry if this does not make sence but heat transfer is a very predictable process that can be controlled by flow rates and temps despite what many beleive. H2O is tweakable and can be controlled with the right equipment...
but in the end no tweaking will gain as much as sticking your rad out the window on a 20 degree night .............LOL
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