Corsair has made large perforations at the front of the Obsidian 450D which give it ample room to breathe. Behind this perforated aluminium panel, there are dual 140mm AF140L fans sucking in cold air from outside and throwing it directly into the area where GPUs are usually located. In addition to these fans, there is space for up to eight 120mm fans around the case. The 450D’s fan mounts can also accommodate a 360mm watercooling radiator at top, a 240mm one at front and a 240mm at bottom. So all in all, the Obsidian 450D has enough space no matter you want air cooling or water cooling.
One 360mm and two 240mm radiator space for $120 only. That's awesome!