From what i see on the picture, it has an optional HDD 120mm fan to cool the top portion while the front 140mm blue LED fan is used to cool the bottom.



Maybe you could add a 200mm fan but most of it comes like 200 x 200 x 30 - and the stock front fan is 140 x 140 x 25. Im not sure if 5mm would make a big diff

Or if you're not running large GPU's then add the 200mm fan at the back of the HDD cage? one 140mm on the front and 200mm on the back, hehehe..push and pull config

No worries, just an idea Glad it worked out for you.