The CRS309-1G-8S+ is a very compact yet powerful networking switch. It has eight SFP+ slots supporting up to 10 Gbit module in each which results in a total switching capacity of 162 Gbps and total non-blocking throughput of 81 Gbps.The device also has dual-core 800 MHz CPU 512 MB RAM a management Ethernet port with PoE power input RS232 serial port a grounding terminal and is capable of dual boot (choose which operating system you prefer RouterOS or SwOS). The compact and sleek metallic enclosure also acts as a heatsink making this device passively cooled - no fan noise and no dust accumulation inside. Special rackmount ears for installing unit into the standard rack are provided.