SunFounder Cubieboard 3 Version A20 Cubietruck ARM More Powerful Than Raspberry PI Enhancements coming on Cubietruck The Cubietruck measures 110 x 80 mm (4.3 x 3.2 inches) compared to 100 x 60 mm (3.9 x 2.4 inches) for the two Cubieboard models. The larger PCB makes room for a new WiFi/Bluetooth module, as well as additional real-world I/O ports. It also makes it convenient to stack a 2.5-inch SATA hard drive directly below the SBC. One of the most significant improvements to the Cubietruck is the addition of a 2GB DDR3 RAM option, as well as the earlier 1GB.