case fan doesn't work

[imajerec]

it's a new aerocool hive frgb v3 case with a preinstalled rear case fan

it has a molex connector not a 3 pin/4pin pwm that goes directly into the mobo port

i have tried connecting it with the psu's coresponding molex connector but it doesn't start spinning

the same psu cable that have the 3 molex connector have some connector that looks like the one that the 4pin pwm case fans comes with, is it necessary that connector goes into the mobo sys_fan port?

trying to figure out why the fan doesn't work

[WoodenMarker]

That extra cable is probably a floppy drive power cable and not needed for the fan.

Spoiler

Make sure there aren't any loose pins in the molex connector and that they're fully extended in the casing. 

[imajerec]

17 hours ago, WoodenMarker said:

That extra cable is probably a floppy drive power cable and not needed for the fan.

  Reveal hidden contents

Make sure there aren't any loose pins in the molex connector and that they're fully extended in the casing. 

i've just tested the psu molex connecter with another old molex fan and it works. it looks like the preinstaled rgb fan was already broken when sent with the case