Friend needs help! Mega needs answer to help friend!

Joined Jan 2005
18K Posts | 0+
Waco, TX
My Neo Geo plays older games like fatal fury and aof it plays fine but when I pop in Garou or some of the newer KOFs it starts resetting over and freezing I have been told i need a better power supply unit. Before I go buy one what do you think?

What should he do?