not cause problems with their graphics cards, resulting in a flood of RMAs) and so took it upon itself to design an adapter that converts 8-pin PCIe connectors to a 12VHPWR, which all AICs are required to include with their custom-design RTX 4090 cards. NVIDIA probably figured out early on when implementing this connector that it cannot rely on adapters by AICs or PSU vendors to perform reliably (i.e. The 12VHPWR connector is a new standard, which means most PSUs in the market lack it, much in the same way as PSUs some 17 years ago lacked PCIe power connectors and graphics cards included 4-pin Molex-to-PCIe adapters. Update Oct 26th: There are multiple updates to the story. Attempting to "wrestle" with the connector, and somehow bending it to your desired shape, will cause improper contacts, which pose a fire-hazard. Combine this with the already tall RTX 4090 graphics cards, and you have yourself a power connector that's impractical for most standard-width mid-tower cases (chassis), with no room for cable-management. This ensures reduced pressure on the contacts in the connector. It comes with a pretty exhaustive set of dos and don'ts the latter are more relevant: apparently, you should not try to arm-wrestle with an 12VHPWR connector: do not attempt to bend the cable horizontally or vertically close to the connector, but leave a distance of at least 3.5 cm (1.37-inch). For starters, most custom RTX 4090 graphics cards have their PCBs being only two-thirds of the actual card length, which puts the power connector closer to the middle of the graphics card, making it aesthetically unappealing, but then there's a bigger problem, as uncovered by Buildzoid of Actually Hardcore Overclocking, an expert with PC hardware power-delivery designs.ĬableMod, a company that specializes in custom modular-PSU cables targeting the case-modding community and PC enthusiasts, has designed a custom 12VHPWR cable that plugs into multiple 12 V output points on a modular PSU, converting them to a 16-pin 12VHPWR. Normally, it should make your life easier as it condenses multiple 8-pin PCIe power connectors into one neat little connector but in reality the connector is proving to be quite impractical. This tiny connector is capable of delivering 600 W of power continuously, and briefly take 200% excursions (spikes). Despite sticking with PCI-Express Gen 4 as its host interface, the NVIDIA GeForce RTX 4090 "Ada" graphics card standardizes the new 12+4 pin ATX 12VHPWR power connector, even across custom-designs by NVIDIA's add-in card (AIC) partners.
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