I bought this case: http://www.envizage.com/products/oem-777-t-bird-red500w-envizage-777-t-bird-atx-micro-atx-red-gaming-case-with-500w-psu-fitted.html but I don't know what size fans it needs on the side door of the case. I've measured the space between the screw holes and they're between 12 and 13cm apart yet you can only get fans that are either 12 OR 13...can someone let me know what size to get? Thanks