ThinkServer always meets the demand for performance enhancement and feature enablement by way of continuous improvement on products and options. Upgrading your systems with the new options will bring you great value with flexibility, scalability and field-proven reliability.1 GB modular DDR3 DRAM cache RAID 0/1/10/5/50/6/60 1 GB Modular flash and Supercapacitor Optional 1 GB cache