SoC: Rockchip RK3288
CPU: 4x Cortex A17 32bit ARMv7-A @ 1.8ghz (these cores are ~40% faster per clock cycle than a53). Cpu performance should be double the raspberry pi 3.
GPU: ARM Mali-T764 (supports OpenCL 1.1, OpenGL ES 3.2, DX 11.1 and vulkan)
2GB LPDDR3 Dual Channel (twice as much as pi3 and faster (lpddr3 instead of lpddr2)
Gigabit Ethernet (Realtek RTL8211E-VB-CG) instead of 100mbit.
802.11b/g/n Wifi + Bluetooth 4.0 + EDR connectivity (Azureware AW-NB177NF)
Micro sd slot with UHS-I speed support.
HDMI 2.0 full-size port, supports 4k resolution and HDCP 2.x
3.5mm audio out (Realtek RTL ALC4040 24bit 192kHz)
Power supply: 5V/ 2A Micro USB (NOT included)
CSI port for camera connection
DSI port supporting HD resolution
40-pin Internal header with 28 GPIO pins
Contact points for PWM and S/PDIF signals
Ethernet and usb don't share the same lane so both can operate quickly at the same time.
Supports debian linux and kodi. Supports 4k h265 10bit hardware decoding. Supports 1080p h264 hardware encoding.
As this is asus not some crappy chinese small company i would suspect that the drivers would be better than boards like the Orange Pi etc.
Unboxing video: https://www.youtube.com/watch?v=qMPOJH-okXQ
You can download the OS here: http://stw.asus.com/download/download.aspx?product=1&model=TInker%20Board/2GB&SLanguage=en-ene&os=8