News AMD Radeon RX 7000 Cards Won't Use 'Hot' 16-Pin Power, Says Industry Veteran

[-Fran-]

Relevant to the discussion:

View: https://www.youtube.com/watch?v=_z58lEnnX1k


Regards.

 

[digitalgriffin]

digitalgriffin, you're full of it.

Never heard of skin effect?

Usually it's ac. But it works well where there are large swings in DC current.

https://en.m.wikipedia.org/wiki/Skin_effect

 

[InvalidError]

Thank you for the explanation. I didn't know such wire can sustain even 100A. I thought it's like with starter cables. Bigger diameter means no power loss and you won't melt the cables.

One of them alone, no. Six of them with some airflow, not a problem as long as you don't mind losing ~3W per wire. If you were surprised on the basis that most electric codes call for #14 for merely 15A, that is because in-wall wiring rules are based on the worst-case scenario of insulated walls so there is no airflow, no convection and almost no conduction to get heat out of there and there can be up to three cables sharing a single path through studs.

Usually it's ac. But it works well where there are large swings in DC current.

https://en.m.wikipedia.org/wiki/Skin_effect

Strictly speaking, DC is 0Hz only. Anything else including transients between DC states is AC.

 

[logainofhades]

Thank you for the explanation. I didn't know such wire can sustain even 100A. I thought it's like with starter cables. Bigger diameter means no power loss and you won't melt the cables.

If the cables were really long, there would be an issue with that much amperage, on such a thin wire connection. The longer the cable, the thicker it needs to be. Learned that the hard way, when I used to have a camper, on AC, and have experienced it in DC applications, on my boat, with regards to the trolling motor. Due to where my battery was, on the boat, vs where the motor mounts, at the time, I needed to run thicker cable, vs now where my batteries are fairly close to the motor. Corsair decided to go with thicker wire, for their PSU cables, with the new connector. Pretty sure it's a solid core.

View: https://www.youtube.com/watch?v=dbT84gxKnMA