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 reports on an issue that the PCI-SIG group has warned about with the Gen 5 PCIe energy adapters. We anticipate finding these in a minimum of the RTX 4000 series 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 knowledge normal. It will permit 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 normal 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, it will 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 you must 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 embody AMD, Intel, and Nvidia.

Please be suggested that PCI-SIG has turn into conscious that some implementations of the 12VHPWR connectors and assemblies have demonstrated thermal variance, which may lead to issues of safety underneath sure situations.

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 risk of harm. 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 may anticipate the adapter to equally draw energy from every 8-pin but it surely doesn’t the truth is. And Wccftech discovered a single 8-pin drawing 23.5A/282W while the opposite two have 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 in case you are planning to get a brand new GPU with RDNA 3 or RTX 4000, they usually do use a Gen 5 connector it could be smart to additionally get a brand new power supply with a gen 5 connector.

Particularly as these cables can be rated for the facility draw. In addition to the overcurrent and transient spikes we would anticipate from the upcoming playing cards.

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