86duino Zero and 86duino One are based on Vortex86EX processor, so they’re the cheapest (39USD / 69USD) ev boards with x86 based processor.

Zero contains 300MHz Vortex, 128MB DDR3 RAM and 8MB FLASH on standard *duino layout. 86duino One adds gyro sensor and provides *duino Mega layout.

Vortex 86EX is a high performance and fully static 32-bit x86 processor. It integrates PCIE bus, DDR3, ROM controller, xISA, I2C, SPI, IPC (Internal Peripheral Controllers with DMA and interrupt timer/counter included), Fast Ethernet, FIFO UART, USB2.0 and SD/SATA controller within a single package to form a system-on-a-chip (SOC).