I have an alternative solution to the noise issue. Since the pump, HDD and PSU create about the same amount of noise it only makes sense to take care of all three. So my solution is to make a soundproof enclosure of the right compartment of my servercase. Where HDDs PSU anb pump will be. The picture below explains it pretty good. When running the sidepanel will seal the remaining side of the box and the hole where the hose and wires enter the left compartment will be tight. The exhaust of the powersupply will push air through the radiator into the chamber on the other side of the radiator. And since that chamber is separate the air will leave by passing through the radiator in the other direction above the PSU. This will limit the need of fans to just the one in the PSU. I do not know how much extra energy will leak through the sound isolation material and into the water via the radiator. I dont know if the water will stay below ambient in this setup. I feel confident that I can run my system without fans as long as I dont overclock to much. And if I add fans to the Heatlanes I should have plenty of headroom.
I have upgraded the CPU MB and memory, to a more overclocking friendly setup. But I have not had time to play yet.
DFI blood iron, E7200 and Cellshock PC9200.
Discovered a poorly placed capacitor stopped me from using the same waterblock on the NB chipset. And the memories are running a bit warm without any airflow. So aside from soundproofing, a ram watercooler and a new chipset WB is on the the todo list. After that I will look at adding fans.
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