what is the average OC for each of these systems and on which console ( with sound please)
NES <--- I don't OC. Sound is at 22khz though. (Little John)
SNES <--- OC to 156mhz - Sound 8bit, 11khz, Stereo Off (OpenSnes)
GG <--- Use fSMS myself and don't change any settings apart from screen size
SMS <--- Read Above
GBC & GB <--- fGB32 is great with debug off.
GPVGB is basic and sound is dodgy on GBC Games.
I haven't tried any others yet.