I have it running fine though the sound is a bit poppy. Who ever made this GUI is a brilliant man 
My bro in law gets broken pcs out of trash and I salvage parts. Running on a quad core a6 with 8gigs ddr3 only using 220watt psu cause using onboard video for now. He wants me to build him one too. Atm only running psx and Snes/nes games from my backups. Ps2 support would be fantastic haha. I have so many I cannot play and most of the emulators let you play from the disk which be wonderful.
Little confused: how do you turn off retroarch without turning off the whole unit? If the unit is offline, how do you modify the cfg files?