dude, have you got any results of pressure drop/flow rate - ie if i was to stack say three or four (or even just two) of these, and use it with a normal pump (ie 12v, not iwaki), then would people still be getting reasonable flow in a loop with cooled 4870x2, and i920 overclocked? would it scale well if we went for more rads, and added in a second 4870x2?