i need help on fans

[dragondx]

i heard on some sites that when you plug the power cable of certain fans to a motherboard (the 3 pin), the mobo will fry, which kinds of fans go into that category ?? thanks

 

[Barrei]

Any one That requires 7 or more watts to run such as some of the 80mm Delta's.

 

[2Cool]

Kind of a rough rule of thumb (based on customers reporting mobo header problems over the past 3 years) any fan over .3 amps should be hooked to a power supply lead.

Now a lot of people have no problems even with high speed 120mm monsters drawing >1 amp, but it depends on the board, the fan, your karma, the day's horoscope, and other voodoo. I am just giving you a rough caution point... not a line of death.