Organizations use SSD as large cache to boost performance by pulling data from what amounts to memory, rather than from much slower spinning disk. The SSD industry regularly takes advantage of the falling prices of memory and storage, which allows organizations like ISE to purchase 128GB of SSD storage at a price that's high but justifiable. However, even SSD proponents admit that DRAM-based SSD systems are far too expensive for use in terabyte-sized systems.