Why the asymmetric design you ask, why not put a fan on each side of the cooler? Well, it's for practical reasons only -- placing one fan in the middle saves space/clearance which is needed for your DIMM/memory.

When we flip the cooler on it's back you'll see the six heatpipe design. Interestingly enough no copper base, instead something that looks like nickel plating-- or at least on the outside. Let's zoom in a little.

Very flat, nothing remotely mirror finished as we see with copper base plates these days. The cooling performance is tremendous though.

Two fans are installed for you --  One NF-P12 (120mm) and NF-P14 (140mm) fan, both of which feature Vortex-Control Notches, SCD technology and SSO-Bearings in order to achieve a great balance of performance and quietness.