I know very little about electricity. I have a question. If my motherboard/CPU is taking power from the 12V rail on my PSU. Would it stand to reason that any usb devices (wifi, Bluetooth) would also draw their power from that same 12V rail? I am trying to figure out how much power i am going to need, and already have alot of external usb devices that do not require external power adapters.
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Every device gets 100mA at startup and can request up to 500mA for general operation.
alright forget this question. I was not thinking right when i asked it.