NVIDIA confirms that this 16-pin ’12VHPWR’ cable for GeForce RTX 4090 and RTX 4080 comes in two variants

As the days go by, more of the mystery surrounding the melted NVIDIA 16-Pin ’12VHPWR’ cable is unfolding and it appears that the company has issued its first official statement on the matter besides only saying that it is still investigating the issues.

NVIDIA 16-Pin ’12VHPWR’ Cable for GeForce RTX 4090 and RTX 4080 are two manufacturers with very different designs

There have been many plausible solutions and explanations offered by various technology outlets and experts including Igor Wallossek of Igor’s Lab. The latest details have brought us one step closer to the source of the issues and we also got confirmation from NVIDIA itself regarding the supplier of these cables.

“We continue to investigate the reports, however, we don’t have more details to share yet. NVIDIA and our partners are committed to supporting our customers and ensuring a speedy RMA process for them.”

NVIDIA spokesperson via KitGuru

We know that NVIDIA 16-Pin ’12VHPWR’ adapter cables come in two flavors, one rated at 150V and one rated at 300V. Despite the higher voltage support and better solder quality of the 300V cable, we’ve seen cases where this adapter has melted as well. We’ve also seen ATX 3.0 PSUs melt and even fully integrated cables melt. In our previous article, we also mentioned that even though the 16-pin connector is fully connected, resistance can cause the cable to loosen, and there’s more to it than that.

NVIDIA 16-Pin 12VHPWR cable from Astron and NTK (Image credits: Igor’s Lab):

It appears that NVIDIA relied on two different manufacturers with two completely different locking mechanisms for their 16-Pin ’12VHPWR’ cable. According to NVIDIA Director of Engineering Gabriele Gorla, these two products have been revealed to be Astron and NTK. Both are located in Taiwan and have PCI-SIG compliant cables but there is only one slight difference that may not be visible to most consumers at first but this can be a big deal based on the resistance and cable drag issues we mentioned above.

The NVIDIA 16-Pin ’12VHPWR’ cable from ASRon comes with a dual hole spring connection while the NTK cable comes with a single hole spring connection. By now you must be thinking higher means better, right? Well, not here. You see, the single-hole spring design allows for less resistance. AIBs such as Zotac and Gigabyte use NTK cables and have stated that they are easier to separate and more reliable for longer life cycles while Astron’s solder quality is a bit poor and has higher resistance.


Meanwhile, both Astron and NTK need to be pushed so hard that NTK will require more for a proper close. Based on Igor’s findings, the 16-pin “12VHPWR” cable should not have a resistance of more than 2 ohms. Now there is no way to conclude that this is the underlying problem as there have been multiple reports prior to this not going right. The issue may be a combination of several issues and there are also design reviews underway. It is possible that NVIDIA is waiting to drop the next revision before making a final statement on the matter.

NVIDIA 16-Pin 12VHPWR Resistance Graph. (Image credits: Igor Lab)

Furthermore, Igor says that the NVIDIA GeForce RTX 4090 and RTX 4080 will rely on different 16-Pin ’12VHPWR’ cable manufacturers while the RTX 4070 Ti will use cables from NTK only. Full details of the issues are listed below:

problem reason solution
poorly installed components,
Straight plugging the impossible
Injection molding ,
prominent casting residues
light write-off
with cutter knife,
Do not use contact grease!
poor fitting connector,
No snap at the end
Injection molding ,
prominent casting residues,
Weak locking mechanism
Visual control by the user
hot contacts,
Conductor Melting (1)
Connect tulip bent by
Inclusion or
Then move the connector
Replace the cable or adapter
hot contacts,
conductor melting (2)
bend the adapter or
mains cable
Replace the cable or adapter
hot contacts,
Conductor Melting (3)
All related reasons Use ATX3 power supplies
With original 12VHPWR connector
or spare PSU cables
(curly in each case)
Insufficient gripping surface for
The correct entry for a file
End stops
Cooler design no one
Insufficient gripping surface for
Correct dilution of a file
connection without bending
Cooler design no one
hot leads
between the converter
and PSU
Transformer with a break
Solder joints or broken cable
exchange converter
plugs/hot plugs
on the PSU side
The PSU design is very poor Replace the PSU

News sources: Videocardz, Tomshardware

#NVIDIA #confirms #16pin #12VHPWR #cable #GeForce #RTX #RTX #variants

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