Quote Originally Posted by serialk11r View Post
Petra calculated that the DDC-2 is about 15% efficient.
...mmmkay... was this some random guesstimate that I happened to have mentioned over AIM or something (likely based on testing that Lee did)? Because, up until just now (since you brought it up), I hadn't run the calculations with my own data (which has already been published in XS).

After doing a little graphing and some rough calculations, I came to the following (all at peak pumping power):

Stock DDC-2: ~17% efficient (~3W max pumping power, ~18W total consumed)
Stock DDC-3.2: ~13% efficient (~2.1W max pumping power, ~16.32W total consumed)
DDC-2 w/DDCT-01s top: ~21% efficient (~4.25W max pumping power, ~20.64W total consumed)
DDC-3.2 w/DDCT-01s top: ~19% efficient (~4.2W max pumping power, ~22.32W total consumed)

Quote Originally Posted by sick_g4m3r
hold the phone. this means the PA120.2 and GTX pressure drops weren't factored in....so all the data would be different...right?
The pressure drop incurred by the components used doesn't change the overall performance characteristics of a pump (there's a reason why you see intersecting curves in the first graph that Stew posted... The red curve represents how the pump performs (flow) at all head pressures attainable by the pump, the other curves represent the pressure drop of the cooling components used vs. flowrate, and the point of intersection represents the head pressure at which the pump operates and flowrate the pump attains given the components attached to it).

Hopefully that'll clear things up a little for you.


Anyway, interesting information, Stew...