I am new to electronic circuits so I might not have the correct nomenclature for some items.
I have 3 high power 12V PC fans (NON PWM) connected to a hub that draw power from MOLEX connector. They can't be controlled by any means except with a on / off IR remote coming with the hub (No hard switches). They draw some high current. They can't be powered over 5V USB directly.
I need advice for simple circuit idea (without Arduino) to connect a USB from Motherboard to control the on/off of these fans (while drawing full power from Molex).
i.e. when the motherboard is powered off, the fans are turned off and when i switch pc on again they turn on automatically (without having to remove the molex connection / using remote every-time i try to switch them off).