Point 1:
Water cooling via a raditor will NOT reduce the CPU temp below the surrounding temperature... the best you can hope for is ambiant (i.e. the two temps being the same).
Point 2:
You CANNOT get any better than an ambiant temperaure with a pure radiator so your idle temp will be the same. BUT when you but a full load working away the WC setup will disapate the heat better then your other setup so your temperatire at load will be lower.
Point 3:
Airflow... what I have found is that running many fans at low voltages is better to running a few at full. i.e. it is just the continuous movement of air you want.
Point 4:
I prefer a reservior which acts as the perfect airtrap so within 5min there is no air lefrt in my systsem except that at the top of my res even though it isn;'t at the highest point in the system. Though many peopel perfer a "T" join. But all of this is personal preference and space contraints. A res. is certainly easier for beginners though.
And I'll leave the other questions to people with more knowledge on the subject.
Hope it helps
~ Boli
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