NVIDIA confirms that the 16-pin '12VHPWR' cable for GeForce RTX 4090 and RTX 4080 is available in two variants

NVIDIA confirms that the 16-pin ’12VHPWR’ cable for GeForce RTX 4090 and RTX 4080 is available in two variants

As the days go by, more mystery surrounding the fusion of NVIDIA 16 pin ’12VHPWR’ cable is taking place and it looks like the company has made their first official statement about it besides just saying they are still investigating The problems.

The NVIDIA 16-pin ’12VHPWR’ cable for GeForce RTX 4090 and RTX 4080 has two manufacturers with very different designs

There have been various plausible solutions and explanations made by various tech outlets and experts, including Igor Wallossek from Igor’s lab. The latest details have gotten us closer to where the problems are coming from and we also get confirmation from NVIDIA itself on the supplier of these cables.

“We continue to investigate the reports, however, we do not yet have more details to share. NVIDIA and our partners are committed to supporting our customers and ensuring an expedited RMA process.”

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 have seen instances where this adapter has also melted. We’ve also seen ATX 3.0 PSUs melt down and even fully inserted cables melt. In our previous article, we also stated that despite the 16-pin connector being fully plugged in, resistance can cause the cable to come loose, well, there’s more to it.

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

It looks like NVIDIA is relying on two different manufacturers with two very different locking mechanisms for the 16-pin ’12VHPWR’ cable. According to NVIDIA Director of Engineering Gabriele Gorla, these two manufacturers have been revealed to be Astron and NTK. Both are located in Taiwan and their cables comply with PCI-SIG standards, but there is only a tiny difference that may not be visible to most consumers at first, but it could be a big problem due to the resistance and cable pull issues that we mentioned above.

ASRon’s 16-pin NVIDIA ’12VHPWR’ cable comes with a dual-slot spring contact while the NTK cable comes with a single-slot spring contact. Now you must be thinking that higher means better, right? Well, not here. You see the single slotted spring design allows for lower resistance. AIBs such as Zotac and Gigabyte use NTK cables and have stated that they are easier to detach and more reliable for longer life cycles, while Astron’s solder quality is slightly poor and has more resistance high.

nvidia-16-pin-12vhpwr-cable-issues-rtx-4090-rtx-4080-_3
nvidia-16-pin-12vhpwr-cable-issues-rtx-4090-rtx-4080-_2

During this time the Astron and NTK cables will need to be pressed in with force, with NTK requiring a bit more to lock in properly. Based on Igor’s findings, the 16-pin ’12VHPWR’ cable should not exceed a resistance of more than 2 Ohms. Now, there is no way to conclude that this is the main issue, as there have been several reports before that have not proven to be correct. The issue could be a mixture of various issues and design reviews are also ongoing. It’s likely that NVIDIA will wait for the next review before providing a final statement on this.

NVIDIA 16 pin 12VHPWR resistor board. (Image credits: Igor’s laboratory)

Additionally, Igor says that NVIDIA GeForce RTX 4090 and RTX 4080 will rely on the two different “12VHPWR” 16-pin cable manufacturers while the RTX4070Ti will only use NTK cables. The full breakdown of issues is listed below:

Problem Cause The solution
Ill-fitting grip,
direct connection not possible
injection molding,
Prominent casting residues
Light chamfering
with a cutter,
do not use contact grease!
Ill-fitting connector,
no snap at the end
injection molding,
Protruding molding residues,
Bad locking mechanism
Visual inspection by the user
hot contacts,
Fusion connector (1)
Curved tulip contact by
angled insert or
then move the connector
Cable or adapter replacement
hot contacts,
Fusion connector (2)
Bend the adapter or
power cable
Cable or adapter replacement
hot contacts,
Fusion connector (3)
All relevant causes Use ATX3 power supplies
with native 12VHPWR connector
or spare power cables
(set in each case)
Insufficient gripping surface for
the correct insertion into the
terminus
cooler design None
Insufficient gripping surface for
correct loosening of the
Connection without bending
cooler design None
Hot leads
between adapter
and power supply
Adapter with broken
solder joints or broken cable
Exchange adapter
Hot plugs/sockets
on the power side
PSU design too weak Replace the power supply

News sources: video cardz, tomshardware

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