I think my question was misunderstood. I wasn't talking about the heat transfer from the radiator to the air. I was talking about the heat transfer from the water to the surfaces of the radiator.
JD: sweet idea for a rad. You could have a blower fan mounted on the outside of the case and the radiator mounted inside the case. The air would flow from the inside of the case, through the rad, and then be blown out by a blower fan.
That is a crude design, I'm sketching something out right now that includes cooling for the hard drives. I'll share it when I'm done
