Quote (WWI @ Feb 27 2015 10:17am)
More effective at transferring heat? Just an uneducated guess.
That was mine too, but i felt wrong guessing that, 
Quote (Urbnopr8r @ Feb 27 2015 12:17pm)
It has to do with the curing process when they bond the fins to the heat sink. Depending on the method used, the cure can be hot enough to deform the copper.
Thanks m8 