Based on Wiki, the Sega Nu has the following specs:
HARDWARE DESCRIPTION
CPU ：intel Core i3-3220（3.30GHz）
GPU ：NVIDIA GeForce GTX650 Ti GDDR5 1GB (Direct X 11.1 / Open GL 4.3 / 2 screen output(Full HD)
MEMORY : DDR3 SDRAM PC3-12800 4GB
SOUND ：High Definition Audio 192KHz / 32bit 5.1ch
LAN : Gigabit
Input and output ：JVS I/O Connector, Serial 4ch, 4x USB3, 2x CAN, I/O Power, DVI-I, DVI-D
Storage ：SATA SSD 64GB + HDD 500GB
OS ：Microsoft Windows Embedded 8 Standard
Other ：SEGA Original security / Windows security
The motherboard is a custom motherboard with 2 DIMM slot + 2 Pcie, model number: DAC-BJ05 REV. A1