On Fri, Dec 06, 2019 at 09:50:45AM -0500, D. Hugh Redelmeier via talk wrote: > Why does it make sense to omit a ground line? If it is specified to be > ground, it ought to be supplied as ground. As I read it, the power supply > must supply ground on all the ground pins but the video card is free to > not use some of them. > > If one of the pins from the power supply isn't connected, then the > cable is defective.
As long as all 8 pins in the GPU side are connected, it is fine. There doesn't need to be 8 wires going to the power supply to do that. > Note: it might be connected within the connector itself via an > internal jumper. Since the 2 sense wires are just to allow detecting the cable type, they don't carry much current at all, and nothing wrong with connecting them together with a single wire from the power supply side. They are connected to ground, but not used as ground for the power carrying part of the cable. -- Len Sorensen --- Post to this mailing list [email protected] Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
