I need get RPi 3 working and play fonline, atleast specs are better than my Pentium 4 trash potato quality, 800x600 6-7 fps, 640x480 73-75 fps.
Pentium 4, 2GHz single core, 504Mb RAM, 32/64Mb GPU.
RPi 3, 1.2GHz-1.35GHz (overclock) quad core, around 700Mb+ RAM (free), 256Mb VC4 GPU.
Atleast RPi 3 meet RAM requirement (512Mb), and GPU is better, CPU is weaker but quad core.