Oh...So if i get the 5+ 120MM fans would be a cooler and silent?
Silent is 1 of the priority.
silent fans = lousy fans.
not all are, for example Scythe Gentle Typhoons are powerful yet
silent fans. but these are expensive.
try my method.
get to the back lane shops in sim lim armed with a 9V
battery, and my crocodile clips -> floppy connector -> molex
-> 3pin fan connector mod.
dig around in those boxes, look for fans that were stripped from
Dell computers. the fan sticker will usually have something that
says 'DELL P/N' so you know its a Dell part.
check the fan physically, see if all blades are intact and in
good condition.
give the fan a spin with your finger, see if it spins evenly. it
should not wobble around. listen to it. it should spin silently and
come to a stop smoothly, not make weird noises and come to abrupt
stops.
next, enquire for the price.
bargain a little.
then test the fan with my 9V mod to see if it spins up
nicely.
clean the fan and bring it home, a happier man. :P