The RTX 4090 comes with two different cables and you should avoid one

NVIDIA RTX 4090 GPUs are suffering from burn-in and melting issues due to the new PCIe Gen 5 12VHPWR adapter . Igor’s lab has been working around the clock to pinpoint the problem, but the giant NVIDIA has remained silent so far. After a lengthy internal investigation involving some NVIDIA officials, Igor’s Lab was able to find out that there are currently 2 different manufacturers supplying new NVIDIA cables.

Choose cables wisely

According to Igor’s Lab, the RTX 4090 uses a cable made by Astron or NTK . The latter has a better locking system and an audible click after insertion. On the contrary, the design of Astron differs from the specified standards. Igor claims that this could be a manufacturing error, which explains why such an occurrence is rare but still possible.

NTK x4 Design
Astron x4 Design

In fact, after rigorous testing, NTK adapters have been found to have lower resistance even after 10 plugs and pulls. Don’t take our word for it, this has been demonstrated by NVIDIA itself. Igor’s Lab has published an exclusive chart highlighting the difference between both brands. The test below basically shows the resistance after x cycles (connect/disconnect).

NTC vs. Astron Testing | Igor’s laboratory

Who is guilty?

Many experts have expressed their opinion about the fiasco of this new adapter. JonnyGuru claims that this issue was the user’s own fault, although other opinions differ. Gamer’s Nexus suggested that the 150V cables used by Igor’s Lab were the main reason . To prove this, he tested a 300V cable and was unable to reproduce the failures that Igor’s Lab encountered.

(Diagram via Igor’s lab )

Problem Cause Solution
Poorly fitted plug,
direct connection not possible
Injection molding, Casting
Lightly chamfer
with a cutter knife,
do not use contact lubricant!
Poorly fitted connector,
no latch on end
Injection molding,
Protruding casting residues,
Poor locking mechanism
Visual control by the user
Hot contacts,
Reflow connector (1)
Curved tulip contact by
inserting at an angle or
subsequently moving the connector
Replacing the cable or adapter
Hot contacts,
Reflow connector (2)
Bending the adapter or
power cable
Replacing the cable or adapter
Hot contacts,
Reflow connector (3)
All relevant reasons Use ATX3 power supplies
with native 12VHPWR connector
or spare power supply cables
(crimped in each case)
Insufficient gripping surface for
proper insertion until it
Cooler design Nobody
Insufficient gripping surface to
properly loosen the
connection without bending
Cooler design Nobody
Hot wires
between adapter
and power supply
Adapter with broken
solder joints or broken cable
exchange adapter
Hot plugs/sockets
on the side of the power supply
Too weak power supply design Replace power supply


In general, it is high time for NVIDIA to intervene and give an official clarification on this issue. Whether it’s a small modification or a whole new cable, it’s of paramount importance. Also, to save itself the hassle, AMD has decided to drop this new “Gen 5 Power Connector” kickstand. All such accusations hurt Ada’s sales because, after all, who wants a broken RTX 4090 and $1,599 less cash?

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