WOW! This looks very nice.
First test indicate 5ºC better than my previous block!
Under similar conditions (XP1600+ @1733mhz. 1.85V), using CPUburn, my previous CPU temps were 19º over water, and now 14º. My mobo is bad for temp testing; it doesn’t use internal diode, and likes to report relatively high temps, so this could be different in another setup.
I still need to make the intake nozzle, so these results could improve.