Photos surface of an apparent four-GPU Radeon RX 470 prototype board

Photos shared by GOK reportedly show a board carrying four Radeon RX 470 GPUs. Each GPU is estimated to have 8GB of GDDR5 and appears to have separate power circuitry; the board appears to have four 8-pin power connectors, one HDMI output and a PCIe x8 interface. Mining is a proposed use, not a documented purpose.