I’m playing NES, SNES, N64, and PSX games with a PS3 controller over bluetooth. Having no problems with ROMs. I’ve got my RPi2 overclocked to the standard overclock setting in raspi-config at 1000mhz. Graphics memory at 384. I’ve only had to moderately change a few settings, but all of the help I have gotten from these forums. Currently the quad core processor isn’t being utilized to its full potential, but theres a dramatic increase in performance compared in RPi 1 to RPi 2.