Approaches for a non-volatile, solid-state storage system that is capable of supporting high bandwidth and/or random read/write access. The storage system may include a chassis having a bus slot and a disk bay, a master card mounted in the bus slot, and a flash memory card stacked in the disk bay and cabled to the master card. The master card enables one or more flash memory cards to be communicatively coupled to a single PCI Express bus. The master card may split a multi-lane PCI Express bus into a plurality of lanes, where one or more of the flash memory cards communicate over each of the plurality of lanes. Alternately, the master card may includes active circuitry for processing, switching, routing, reformatting, and/or converting the PCI Express bus into one or more busses for a plurality of flash memory cards. The stacked flash memory card is not in an enclosure.