No problem. The Cosmos 2 is a beastly case. Frankly, it makes me wish the BE was a larger form factor to make the MB less cramped (the connectors on the bottom row are REALLY hard to access with a 3-slot GPU installed in the lower 16x PCIe lane, and push/pull on the top with a H100i is a no go). Plus, between the BE fan controllers and the Cosmos fan controllers, you have a ton of options for fans (and the OC Panel has fan headers too!). I do wish the Cosmos fan controller had an "off" setting besides low. Alas, the BE can do this, but ONLY when using AI Suite 3 (which I don't like). I have a Corsair Link Commander too but the software sucks just as bad (actually, worse) as AI Suite, and it has no "off" option either.
Rampage IV Black Edition | 4960X 4.5 GHz x6 @ ~1.232V | 64 GB 2133 1.5V @ Stock XMP
2x Crossfire Matrix Platinum 7970s @ Stock | AX1200i | H100i | Corsair Link Commander
1 TB EVO | 3 TB WD Red | CoolerMaster Cosmos II