Swiftech Apogee GTZ, Aqua Computers Cuplex HD and XSPC Delta v3 Water Blocks Compared
 

The AC Cuplex HD is an amazingly well crafted waterblock, and one that would compliment a high-end rig perfectly. The quality and craftmanship is really evident here. Admittedly though, the AC Cuplex HD waterblock is very restrictive and would be better suited to either a CPU only loop, or with a high-flow pump. If you were to use the AC Cuplex HD in a water-cooled SLI setup, you may find the flow less than adequate. However, to the AC Cuplex HD's credit it exhibits very little pressure drop.

http://www.overclock3d.net/reviews.p...ock_shootout/1