Yes, the N520 is big, measuring an observed 121 x 102 x 140mm in size but you don't get the feel of purposeless bulk. The high count aluminum fin assembly is held in place by four 6mm copper heatpipes per side. Notice below how the opposing 92mm fans are not symmetrical. This allows for an increased amount of active cooling on each of the heatpipe assembly areas directly.
FULL STORY @ OVERCLOCKERCAFE (http://www.overclockercafe.com/Reviews/cooling/CoolerMaster_Hyper_N520/index.htm)