Quote Originally Posted by Petra View Post
I've already faceplamed one over pressure-related comments today...

A better way of putting it would be as follows:

If the pressure drop curve of your entire watercooling system were "low enough" to cause a DDC-3.1 to operate at or in excess of 1GPM, then the DDC-3.1 would offer slightly better flow than the DDC-1 due to its performance curve being stronger past that point.

Well, am I to interpret that you prefer the older design? Now, I acknowledge that you know far more about the ddc pumps than I will ever know. And in fact I'm quite happy that this might prove an op. to pick your brain.

When lang revised their ddc-1, and ddc 2, into the 3.1, and 3.2 models, they both seem to have lost some psi, the 3.2 significantly. I have two ddc2s, and I'm waiting on a 3.1 that should arrive today or on monday. What do you feel where the design advantages when they elected to do the revisions in such a fashion?

Generally, i think the goal is to keep it at or above 1gpm. Did you feel that you got better performance out of the ddc 1, using your top for instance?
In my case, i noticed that I had to run the ddc2 at maybe 50 percent, to gain an acceptable noise profile. So I am not running my pumps in their optimum range, and the extra pumping power is lost on my low resistance loop. (fuzion v2, xspc rx360, danger den ion g92, ek nforce rev 1.1) So if someone was going to use a ddc 3.1 in a low resistance loop, wouldn't they stand to benefit? Or is that not representative of most of the people who would buy the 3.1, and they would of been better served by the original design? Would any of these conclusion apply to the design shift from the ddc 2-> 3.2 or even the 3.25?

Your thoughts, will be greatly appreciated . I apologize if you experience a face palm moment due to my questions