On Wednesday 29 November 2006 22:08, Mike Huber wrote: > By rail you mean a connection to the motherboard right? The power supply > itself has a 5v rail, which is delivered to the drives. Correct me if I'm > wrong, but that's my understanding.
there is 5V and there is -5V. 5V is needed for io stuff (like the drives), -5V was used for the ISA slots. When the ATX standard was created, one of the 20pins/21cables was -5V. Since -5V is not needed anymore, it was dropped some time ago. The connector is still 20pins 'wide', but one of them is empty. -- gentoo-user@gentoo.org mailing list
