Very aesthetic facade with its brushed steel and caps on heat pipes, whilst requiring. Cube shape can place the fan on any side for optimized air flow, some say that even passive it works fine, but I find it rather silent so no need to deprive yourself of the fan. (My diet was a racket, I do not know if it is really very quiet, careful).
Level efficiency, what to say except that it is simply a monster! Mounted on an i5 3570K (Turbo up to 3.8GHz), games (BF 4, Watch_Dogs, Wolfenstein, Batman Arkham Origins ...) CPU not exceed 50 ° C and again, then it should do well at least 30 -35 ° C in the room (yes, it's summer). To know that my config is composed of:
i5 3570K HD 7850 OC, Zalman Z11 Plus, DD 3, 2 SSD and that I have not added to fan more than those already present in the Z11 Plus, temperature level so it handles more than well!
All that for a unbeatable price.
In short, I RECOMMEND!