Make sure to check out the "Recommended Accessories" on this page. Open Box: This units has been tested with DietPi and Ubuntu via eMMC and they are working correctly. ODROID-C4 is a new generation single board computer that is more energy efficient and faster performing than ODROID-C2 which was introduced over four years ago as the world’s first affordable ARM 64bit computer.The main CPU of the ODROID-C4 is built with a quad-core Cortex-A55 cluster with a new generation Mali-G31 GPU. The A55 cores run at 2.0Ghz without thermal throttling using the stock heat sink allowing a robust and quiet computer. The CPU multi-core performance is around 40% faster, and the system DRAM performance is 50% faster than the ODROID-C2. Check out the ameriBlog post for more details KEY FEATURES CPU: Amlogic S905X3 12nm Processor Quad-Core Cortex-A55 (2.016GHz) ARMv8-A architecture with Neon and Crypto extensions GPU: Mali-G31 MP2 GPU with 4 x Execution Engines (650Mhz) Memory: DDR4 4GiB with 32-bit bus width 2640 MT/s (PC4-21333 grade) (Now also available in 2GB RAM) Storage: 1x eMMC connector (8/16/32/64GiB are available) 1x Micro SD slot (DS/HS mode up to UHS-I SDR104) Networking: 1 x GbE LAN ports (RJ45, supports 10/100/1000 Mbps) Realtek RTL8211F (Ethernet transceiver) Video: 1 x HDMI 2.0 (up to 4K@60Hz with HDR, CEC, EDID) Audio: 1 x HDMI digital output 1 x Optional SPDIF optical output External I/O: 4x USB 3.0 Host ports (shares one single root hub) 1x USB 2.0 OTG port for Host or Device mode. (No power input) 1x Debug serial console (UART) 1x Peripheral Expansion Header (40-pin, 2.54mm pitch) 1x Audio Expansion Header (7-pin, 2.54mm pitch) DC input : 5.5V ~ 17V (DC 12V/2A power adaptor is recommended) Board Dimensions: 85mm x 56mm x 1.0mm Heatsink Dimensions: 40mm x 32mm x 10mm Weight: 59g including heatsink NOTES It is possible the 5V Step-Down Converter (U25) on the ODROID-C4 could be damaged when 15V/4A power supply is plugged into the ODROID-C4 (https://forum.odroid.com/viewtopic.php?f=205&t=42112). Therefore, it is recommended to not use a 15V/4A Power supply with the ODROID-C4. Because the ODROID-C4 requires a minimum of 5.5VDC, it is also not recommended to power the ODROID-C4 through the 5V GPIO pins. LINKS Wiki Page: https://wiki.odroid.com/odroid-c4/odroid-c4