mega138Si peed Tang MEGA 138K Pro Specification v1.0 5 1.3 Hardware Overview 1.4 Working Conditions Items Description SOM power supply Working Voltage: Mainboard provideSipeed recently launched the Mega 138K Pro dev board. It’s built around the GOWIN GW5AST RISC-V FPGA and features 2x SFP+ ports, a GbE port, dual DVI interfaces, 8x 12.5Gbps Serdes, and other peripherals.