The PRO EX is a PCI-e expander, it supports up to 7 PCI-e x8 compatible cards. Add storage as you need with the grow-as-you-go expansion or simply aggregate your existing PCI-e based storage for instant online access. The seven expansion slots in the PRO EX will accommodate half length (174 mm) full height PCI-e cards with x8 physical slot size or smaller.
The PRO EX expander combined with the PRO DQ RAID storage subsystems can offer up to 56TB of online storage. If more is needed, additional PRO EX and PRO DQ combinations can be added to a daisy chain to get even more storage. This provides virtually unlimited storage capacity.