From the manufacturer's
product page:
- Can accommodate up to a total of 8 system fans (4 x 14cm + 4 x 12cm)
What Xigmatek doesn't mention is "8 system fans
if you buy it without the side window". With the window, it only holds 6 fans (i.e., no side fans to blow on your video card).
Lots more pics on the product page.