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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 reviews on an issue that the PCI-SIG group has warned about with the Gen 5 PCIe energy adapters. We look forward to finding these in at the 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 knowledge commonplace. It will 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 commonplace goals to ship cleaner and fewer transient energy. Hopefully ending some issues brought on by the rising 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.

Nonetheless, 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 you need to get a brand new energy provide for the brand new GPUs

The preliminary data got here from an electronic 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 grow to be conscious that some implementations of the 12VHPWR connectors and assemblies have demonstrated thermal variance, which might lead to issues of safety underneath sure circumstances.

PCI-SIG electronic mail to its members

The e-mail states there’s a threat to utilizing these adapters. With a thermal variance, it means there’s a risk 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 take a look at powered with the included 3-to-1 cable adapter.

You would possibly anticipate the adapter to equally draw energy from every 8-pin however it doesn’t actually. 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 is just not 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, and so they do use a Gen 5 connector it might be smart to additionally get a brand new energy provide with a gen 5 connector.

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


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