3 case fans on 1 header

[paschalis.sigmas]

So i want to connect 3 fans each drawing 0.3 amp to just one 4 pin connector with a y splitter.the max of a single connector on my motherboard is 1 amp.Am i safe using 0.9 amps or is it risky af having just 0.1 amp of play.i also have a 2amp aio port also a 4 pin should i just use that to power the 3 fans?

 

[jay32267]

"Am i safe using 0.9 amps or is it risky af having just 0.1 amp of play."

You should be safe.

Although if you wanted more comfort....you could apply 12 volts to each fan and measure the current and add them.

I'm not sure of the specs on the other ports...but they might also be an option....but as I said....I think you should be OK using the case fan header.

 

[jasonkaler]

That is a bit risky with only 0.1 amp spare. Pulling more power from a board than it can handle will damage it.

On the other hand... the amp rating on a motor is its maximum, which generally only occurs if the fan gets stuck. So in practice, the fans will draw less than 0.3 amp each.
Also consider that they might be rounding off, so 0.3 might actually be 0.28.

I personally wouldn't risk it. It may work fine for a few months and then kill you motherboard when the load on the fan increases because of dirt in it.
Rather source power from elsewhere, for one of the fans.