bigben2k:
Actually, I am running this PC in my home workshop (garage so to say). I play around with power tools just for hobby and try NOT to break things. The design of garage is such that its sound proof. However, the very design results in room to be hotter.
If I turn on the AC, then I cannot solder
Furthermore, I am using Al block. Converting it to Cu would yield reduction in temperature [hopefully]. If the difference were marginable, I would redesign the reservoir so that it becomes vapor cooled as well.
Finally, I am also working on Microcontroller 8051 series that would control this rig. It would sense and report temperature, flow of water and fan speed (control it as well with temperature as reference). Using a Microcontroller has an advantage as well, since its standalone it can force shutdown PC if anything bad is to happen e.g. if temperature is too high.
MC would report everything to PC using COM port. Its simple but would make the rig complicated.
RADCOM:
SpotCool
I had the very same design in mind. Infact I was searching for materials to construct it. I see its thermally controlled as well. Price USD20 max.
Aces!