I don't see that it has anything to do with europeans wanting silence, not oc, but I see this: In a discussion on this forum some time ago, people still seemed to have wild theories about high waterflow equaling better cooling. Graphs and bars were presented, "proving" that higher flow gives a cooler cpu. But all these theories where untested, just theories. The irony of it is, that this discusion was initiated by someone who saw his temps rise after installing a bigger pump. It all turned out rather Hegelian, some trying to alter reality to make it match their theory. On this german aqua-computer site, there is a forum, on which a well educated technician has tested, not theorised, the relation between flowrate and cpu temperature. And, surprise surprise, between reasonable limits, there is no relation.
Point is: the heat capacity of water is so great, that at a reasonable flow, water doesn't even significantly heat up with one pass through a waterblock. In theory, a faster pass through the waterblock will heat up the water even less, but a faster pass through the radiator will also make it cool down less. The average temp of the water remains the same.
With 8mm watertubes, you can easily get enough waterflow to keep the cpu cool. If not, the waterblock is probably very inefficient in releasing its heat to the water. I have an Eheim 1046 pumping water through 8 mm tubing, a cpu block, a vidcard block, a norhbridge block, 2 harddisk blocks and through a passive radiator wich consist of 12 meter of copper tubes with a diameter of 10mm. My cpu, a p4 2GHz, runs at 30 C. That's why everybody in Europe runs 8mm tubing and those small barbs. Keeps your case tidy
