Quote Originally Posted by Philwong View Post
I'm confused? The mod tops reduced the head pressure, but yet increased the flow?
Yes, this is the trade-off with the custom tops (the odd exception being the XSPC reservoir top and a couple other integrated-reservoir tops)... the trick is to go for the least drop in head pressure and the largest increase in mid-range flow. What really confuses most people is when you tell 'em that the max head/discharge numbers aren't very meaningful since the middle 50-65% of the performance curve is all that matters for most PC cooling systems.

Waterlogged: based on some of my old curves, you're looking at, what, about a 3psi drop across that flowmeter given the "max" flowrate numbers you were able to pull?

RoadconeTuning: The higher the pressure drop of the system, the closer the results are going to get between pump configurations (to the point where it really doesn't matter wether you're using a custom top or not...take a CPU/GPU/radiator loop with an AqX MP-1GPU, MP-05 SP LE CPU block, and a BIP, for example: you'd be looking at a flow difference of about 0.07GPM between a DDC-2 with top and without top, a difference of about 0.18GPM between a DDC-2 with top and a D5, and a difference of about 0.11GPM between a D5 and stock DDC-2).