Originally Posted by Xyrate
I do remember someone posting about how they got better temps with the radiator in the CD bay as opposed to it being in the back of the case. I will look for the link after work today.
That would be cjc75. I did the same and did not have the same results. In fact, though my CPU temp stayed the same, my northbridge temp went up 5c.
However, I did stumble on something by accident that makes total sense now. I was trying to quiet down my case fans by setting them to 75% in the BIOS and I noticed my CPU temp dropped 3-5c. I had set all my system fan headers to 75%. This included the header from which I was running my H50 pump on. How the H would reducing my pump speed drop my CPU temp, I asked myself. Then it dawned on me, by reducing the coolant speed through the radiator, it had more time to cool. Just like taking the thermostat out of the cooling system of your car can lead to overheating as a result of the coolant not being in the radiator long enough to exchange the heat into the air. It carries part of the heat back into the engine.
So maybe some of you guys with H50s running your pumps on a system fan header, not the CPU fan header, can try this and see if it corroberates my findings. If so we may be on to something.