I have changed the size of the chassis: 220 * 86 * 150MM, and support two full size SSD hard drive, built-in 200W power supply, do a good job after the finished product will send some pictures up, thank you for your creativity.A NUC would make more sense since they're available with the PCIe 3.0 x4 M.2 slots required and have already been proven to work with a discrete GPU.