Front 80/90/120mm Fan x1pcs (optional)
Rear 80/120mm Fan x1pcs (optional)
Left Side 120mm Fans x2pcs (optional)
http://www.cougar-world.com/us/products/pc_case/spike.html
Bottom of page shows possible fan locations.
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103061
COOLER MASTER R4-C2R-20AC-GP 120mm Case cooler