3 Pin + 4 Pin Molex LED

[outcast61]

Hello, I'm building my new computer today and the case I bought comes with a blue LED fan. The fan has two black wires coming from it, one being a 4 pin molex and another being a 3 pin (which I have no idea what it is). I really had no idea, I tried searching around but i'm clueless. I tried plugging the molex into the power supply and the 3 pin into the PLED slot but still doesn't light up. Please help me!

 

[alexoiu]

Hi, You can either connect the molex to the PSU and the fan will always spin at full speed or use the 3-pin connector and plug it in one of the CHA_FAN connectors of the board. In this case the fan will be controlled by the board

 

[outcast61]

Thank you, but the LED still isn't lighting up.

 

[DarkSable]

Then it's a dead LED. Probably just has a wire disconnected somewhere, but... As long as the fan itself is working, I wouldn't worry about it.

 

[alexoiu]

What motherboard do you have?

 

[sfvirgo86]

Is there a switch or button on it or on the case? Also what's ur case?

 

[outcast61]

No switch or button; It's a cheap RAIDMAX case with a 500w PSU, had to fit my budget so your probably right, i'll check to see when I build the other PC. Thanks for your help. The MB is an AsRock FM2A75 Pro4.

 

[alexoiu]

So if you connect only the molex, when starting the board the fan does not spin and the led is not lit?

 

[outcast61]

I have tried all combination, the fan always spins, but the LED never lights.

 

[sfvirgo86]

i would just scrap the fan and get a new one, led fans are dirt cheap and any one u can buy will most likely be better than the ones that come with cases