The ICY DOCK ToughArmour MB606SPO-B is an interesting idea for adding more storage to the gaming box.
The MB606SPO-B has room for a slim optical drive and six SSD drives. There are lots of SATA controllers to handle such a product which can give a boost easily. This item was found on a Japanese site and it now widely elsewhere. The MB606SPO-B needs a lot of SATA connectors and power. ICY DOCK has a full range of these units with upto 16 drives to fit a pair of 5.25″ drive bays. Some of the units are designed to use server type SAS disk controllers which are readily available.