I imagined great but it is even more true. He currently cools i7 3770k @ 4,2GHZ stride, 45 ° C and 55 ° C set in heavy load, I do not hear it in play and heavy load noise is really low, I was impressed this side. With my motherboard Asus P8Z77-V Pro I'm enjoying the Fan Xpert 2 software to manage all the fans.
In "silence" I've changed, I hear nothing, all the fans of the case are silent, they are well chosen, and really, complete silence, I wonder if it is on. In this mode I take Youtube with several videos simultaneously, and no noise.
But downside, the front fan, one 120mm is not recognized. On my CM I have taken 2 for PWM fan, so perfect, however the fan in front was not recognized by the BIOS or Fan Xpert 2 while it was connected to the CPU fan socket. I plugged the other fan this jack thinking sake of the fan outlet but it works very well. So good that only means that I can not manage the fan, it accelerates well with each other in the temperature so minor issue we will say.
If not perfect, but be careful, in a Zalman Z11 more I had to cut the two small clips holding the glass top of the left door so that it closes properly, no worries for the glass it holds very well but you have been warned !