NV 12VHPWR issues revisited

[Heartbreaker]

Some interesting tidbits from the connector specs in the PCIe_CEM_R5.1_V1.0 documentation:

To me this shows increased reliance on the testing and the quality standards of each manufacturer. The 9.2A per pin load is actually the minimum requirement before testing. The final max rating can be anything based on connector side-load testing

"The specific wire, connectors and manufacturing process used for a cable assembly must be designed to accept the current imbalance due to contact resistance variability and side loading"

How the heck are they supposed to do that? It may be that they are expecting minor imbalances, so It can handle 10 or 11 amps, but we are seeing much worse in some cases.

It seems like they need some kind of Apple-like cable/connector approval process, where many samples are torture tested.

I remember the recent issues Der8auer had with his properly plugged in cable with no side loads. These were not minor current differences, he had 2, 4, and 5 amps on some wires and 23 amps on one of them.

To get those kind of imbalances, he had to have multiple very poor conductor/connection in the set. Which kind of points to a poor manufacturing process somewhere.

I was a little disappointed that he didn't investigate into the source of that cables issues (He plugged in a new cable and everything was fine). My curiosity would be why was the original cable so bad? It's rare to catch something this bad before it melts obscuring the original problem, so it was a unique investigation opportunity.

 

[DrMrLordX]

Techpowerup sums it up nicely:

lol

I thought there were a few of them? It's not like anyone can realistically buy one at this point so, the point is good enough. Needless to say, unless there are 5090s with two connectors out there from AIBs, the 5090 is substantially worse.

 

[Ranulf]

Melted cable on a new 5070 for a Japanese user. OC3D says probably just a faulty card.

RTX 5070 user reports melted 12V-2x6 power cable - OC3D

It looks like lower wattage GPUs are not safe from 12V-2x6 cable issues. An Nvidia RTX 5070 has suffered a melted cable incident.

overclock3d.net

 

[coercitiv]

View attachment 114485

That's good design. As long as you see that color, it's not plugged in properly. Not sure what colorblind people would see though. Hope the bright whatever color they see stands out from the black.

Your colored tips have no power here, puny human.

https://twitter.com/x/status/1916819216629653922

 

[igor_kavinski]

I'm so glad that I'm free of the stress of owning a halo Geforce GPU: https://www.overclock.net/posts/29460965/

...and lastly i will need a new gpu as moving around the 4090 is not a wise choice with such a notorious connector design that has already bbq'ed a bit 3 cables do far.

That is really sad that people who paid cold hard cash are so scared of potential issues that they are not even moving the cards between their own rigs lest they get bitten by this infamously notorious engineering flaw.