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Subsequent-gen GPUs at risk of overcurrent with adapters

An excessive amount of energy for the poor decrease spec cables to handle

Up to date: Sep 12, 2022 9:52 am

Wccftech experiences on an issue that the PCI-SIG group has warned about with the Gen 5 PCIe energy adapters. We anticipate finding these in at the very least the RTX 4000 sequence and what’s already been proven on the RTX 3090 Ti.

The brand new connector is a brand new 12-pin energy and 4-pin information customary. It might enable the PSU to speak with the graphics card and resolve the quantity of energy offered. The info permits as much as 600W on a single cable or 450W with out.

This new customary goals to ship cleaner and fewer transient energy. Hopefully ending some issues attributable to the growing energy demand of GPUs.

Beforehand, the 8-pin PCIe connector is able to offering 150W. So with the present era, we noticed the utilization of three of them on one card getting the spec as much as 450W.

Nevertheless, producers have a tendency to supply energy adapters for this new spec. As seen with the 3090 Ti, this can present 450W with three 8-pins. However that is the place PCI-SIG and Wccftech present the hazard of utilizing these.

GIGABYTE PCIE Gen 5 16 pin connector
PCIe 16-pin connector on a Gigabyte UD1000GM

Why it’s best to get a brand new energy provide for the brand new GPUs

The preliminary info got here from an e-mail forwarded to Wccftech from PCI-SIG. The e-mail was despatched to the member of the group. These embrace AMD, Intel, and Nvidia.

Please be suggested that PCI-SIG has change into conscious that some implementations of the 12VHPWR connectors and assemblies have demonstrated thermal variance, which may lead to questions of safety beneath sure circumstances.

PCI-SIG e-mail to its members

The e-mail states there’s a danger to utilizing these adapters. With a thermal variance, it means there’s a chance of injury. Both from the connector melting down or offering incorrect energy to the cardboard.

With this, Wccftech has carried out its personal testing to see what the problems could also be. There they loaded up a 3090 Ti with a 450W load check powered with the included 3-to-1 cable adapter.

You would possibly count on the adapter to equally draw energy from every 8-pin however it doesn’t in actual fact. And Wccftech discovered a single 8-pin drawing 23.5A/282W while the opposite two had been solely doing 6-8A/80-100W.

While a Gen 5 connector itself can maintain as much as 55A or 600W, a singular 8-pin isn’t rated for such excessive consumption. These are solely rated for 150W and that cable was being loaded 88% above that.

So if you’re planning to get a brand new GPU with RDNA 3 or RTX 4000, they usually do use a Gen 5 connector it could be clever to additionally get a brand new energy provide with a gen 5 connector.

Particularly as these cables will likely be rated for the facility draw. In addition to the overcurrent and transient spikes we’d count on from the upcoming playing cards.

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