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Do not bend 600W RTX 4090 energy cable to cut back threat of overheating says CableMod

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Colorful RTX 4090 Batlle Ax graphics card

(Picture credit score: Future)

It isn’t advisable to bend the 12VHPWR connector presently in use by Nvidia GeForce RTX 4090 (opens in new tab) graphics playing cards, and included throughout the ATX 3.0 spec, in any manner throughout set up or use.

Producer of high-end cables, CableMod, has warned customers that any odd bends or turns within the cable might put additional strain on the connector and possibly even improve the danger of overheating. The corporate warns in opposition to vertical bends and horizontal bends, which basically means customers ought to goal to maintain cables completely aligned and straight or threat malfunction.

Anybody who’s ever constructed a PC will perceive that this is not all the time potential.

The 12VHPWR connector was launched as part of the ATX 3.0 specification (opens in new tab), revealed by Intel, and is meant to cut back the facility footprint for connectors on a PCB and ship as much as 600W of energy. Thus far it has solely been adopted to be used with the RTX 4090, nonetheless, different graphics playing cards are anticipated to observe swimsuit.

“This new connector can ship the facility required for these power-hungry playing cards, but additionally comes with some caveats that customers want to pay attention to,” CableMod says in a put up on its web site (opens in new tab) from September 25.

“The 12VHPWR connector and the terminals utilized in it are a lot smaller than the earlier technology. By means of our intensive testing, it seems that bending the wires too near the connector might lead to a number of the terminals coming unfastened or misaligning throughout the connector itself. 

“This will likely result in an uneven load throughout the opposite wires, growing the danger of overheating injury. The danger of that is considerably greater if the bend is completed horizontally in relation to the connector orientation (left to proper),” CableMod notes.

CableMod 12VHPWR power connector recommendations

CableMod’s recommendation is one thing to be cautious of for those who personal an RTX 4090 at this time. (Picture credit score: CableMod)

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Cablemod additionally states that any bend on the 12VHPWR cable ought to happen 35mm from the connector itself—simpler stated than finished.

The rationale I am highlighting this put up from the corporate at this time is because of a put up earlier at this time from a consumer on Reddit (opens in new tab) exhibiting the 12VHPWR cable connecting their RTX 4090 to the facility provide had fully failed, melting within the course of.

The unlucky PC builder believes their setup was suitably simple, and that they did not have too aggressive a bend in place. Pictures offered by the consumer (opens in new tab) do present a slight bend, and one doubtless extra aggressive than Cablemod’s 35mm advice, however actually nothing that I might have a look at and contemplate incorrect or irregular by PC constructing requirements. 

If you happen to did not know one main cable agency suggested in opposition to that form of bend, you would not assume something dangerous of it.

“I do not know why it occurred. I feel my adapter cable is defective. Welp I suppose RMA it’s EDIT Card was hooked up vertically. Bend was not that aggressive. Certain there was bend nonetheless this could not occur on a 2k Euro GPU PSU Corsair RMX 1000,” the consumer reggie_gakil says within the discussion board thread.

rtx_4090_adapter_burned from r/nvidia

We won’t hyperlink this single failure to bending or another trigger right now—generally issues do fail fairly dramatically. And whereas it isn’t as if I hear many tales of PCIe cables melting, outdated or new, I might dare say this is not the primary time it has occurred. 

Nevertheless, this new 12VHPWR connector is just not additionally with out its critics.

Overclocker and PCB analyser Buildzoid has already revealed a scathing evaluation (opens in new tab) of the connector referred to as “The 12VHPWR connector sucks”, citing their issues with the less pins in place for the 600W energy supply versus the older PCIe energy connectors and the necessity for the change in energy adapter within the first place.

Gigabyte PSU with 12VHPWR connector

(Picture credit score: Gigabyte)

WCCFTech (opens in new tab) additionally beforehand reported that PCI-SIG, the group accountable for managing the PCI normal, instructed its members to be cautious about some implementations of 12VHPWR and thermal variance when utilizing adapters to non-ATX 3.0 spec PSUs, which might result in issues of safety. 

“We advocate members work carefully with their connector distributors and train due diligence in utilizing high-power connections, notably the place security issues could exist,” PCI-SIG stated in a communication with members.

Nevertheless, Nvidia has already made an try and ease house owners’ issues about this assertion from PCI-SIG. In a response to the query: “Why did PCI-SIG subject the warning and the way does this have an effect on NVIDIA’s new merchandise?”, Nvidia stated a month in the past (opens in new tab):

“It doesn’t have an effect on NVIDIA’s new merchandise. Throughout early improvement and testing we recognized a possible subject with a prototype connector manufactured from a sole provider. As a PCI-SIG member, we knowledgeable the provider, requested them to repair it (which they did), and shared our findings to assist suppliers who’re implementing the brand new normal. The PCI-SIG was passing alongside these learnings to different suppliers.”

So, from an official perspective, a minimum of of the GPU producer, all is properly with the connector. Although that will solely perform a little to ease issues of different RTX 4090 house owners—the picture posted to Reddit of what might go fallacious with the cable, ought to a malfunction happen, is just not a reasonably sight. However we will solely contemplate this as far as an remoted incident at this time.

I wish to assume that the ratification of this connector throughout GPU producers, Intel, Nvidia, and PCI-SIG can be enough to make sure that mere bending of a cable deliberate for use by many hundreds of individuals would not trigger it to combust. Hearth dangers shouldn’t be taken evenly. (opens in new tab) That stated, I might additionally personally be inclined to observe Cablemod’s recommendation if I had been utilizing this cable inside my very own PC at this time.

In mild of that, and the rising disquiet amongst some PC builders relating to the cable’s security, I additionally foresee some try and be made to quell any additional issues by the aforementioned firms. On the very least to revive religion within the security of the connector.

Jacob earned his first byline writing for his personal tech weblog from his hometown in Wales in 2017. From there, he graduated to professionally breaking issues as {hardware} author at PCGamesN, the place he would later win command of the equipment cabinet as {hardware} editor. These days, as senior {hardware} editor at PC Gamer, he spends his days reporting on the most recent developments within the know-how and gaming business. When he is not writing about GPUs and CPUs, nonetheless, you will discover him attempting to get as far-off from the trendy world as potential by wild tenting.

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