The PROTON 600K from Space Micro is a Satellite On-Board Computer (OBC) that is an advanced radiation hardened 3U Open VPX Single Board Computer with eight ARM Cortex cores. This high-performance SBC is built with dual arm cortex-A72 application cores and uses operating systems such as Linux, VxWorks, Integrity, Green Hills and others. It has system FPGA module controller and features a 3U Open VPX Compatible High Performance Computing Payload Module. This radiation-hardened SBC has a 128 MB Dual Quad-SPI Serial NOR FLASH with on-chip ECC 64 GB eMMC 5.1 (for EM/SDU only). It requires a DC supply voltage of 28 V and has a power consumption of 12 W. The SBC has a mass of 475 g and is ideal for high-performance computing, multiple operating systems, command and data handling, image processing and signal processing applications.