Now, my question about connecting 2 fans in parallel to one 4-pins header. Originally, I connect the pump to the CPU 4-pins which was a waste because the pump rpm is not controllable. I am surprised that no one asked me about the fan connection so far. There is no change to the CPU core temperatures at the lower fan speed. The water pump runs at constant 1500 rpm and can be connected to any fan header, 3 or 4 pins. They fans are now running below 1000 rpm in normal operation and are very quiet. They are PWM fans and the can be controlled by the MB smart fan control if the MB has that feature. The fans should be connected to the CPU fan 4-pins header. I did not connect the cooler fans correctly at first. If it gets quieter and cooler, it is a bonus. It drops to under 50☌ with an Artic-Cooling Freezer 7 Pro. The CPU temperature runs about 60-65☌ with stock cooler. Now, I am ready to put my desktop computer back together to test it. The result looks really ugly, but it allows me to mount the water pump head properly and securely on the 775 motherboard. It takes time and must be done carefully. My Dremel with the thin cutting plate did the trick for me. It ruin the drill bit, even carbide ones, quickly. Corsair use good gauge hard metal for the bracket. I tried to drill it out, but it did not work. The mounting slots on the metal bracket must be move inboard 1/8' each. But you cannot modify the Corsair one coming with the H75 kit. I expect almost any generic one will work. You must have a LGA775 generic backplate. So I decide to do surgery on the Corsair hardware. The Asetek mounting kit is on order, but it won't arrive until next week.

Corsair hydro series h80i v2 tdp