6 volt is probably not enough to power most computer fans theres just not enough voltage to get the fans spinning at full power. Your gonna need a 9 or 12 volt (most likely 12) to run a pc fan. Also make sure that the adapter has enough amperage to run the fans.
Dimebag Reviewed by Dimebag on . computer fan question I got 2 computer fans, and I powered them up with gameboy 6 v adapter. but most people say that you need a computer power suply to power them. so is adapter not suitable for this ? will adapter overheat and burn if it'll be ON for 24/7 ? Rating: 5