Unlike the endless stream of aftermarket adapters designed solely to prevent 16-pin power meltdowns, DallasGrave's iteration is more like a power-conversion kit. The direct-mount kit sits above the graphics card and uses a custom harness soldered to the graphics card’s PCB power rails. The quad 8-pin power conversion kit bypasses the 16-pin connection and redistributes the massive power draw more evenly across four conventional 8-pin PCIe power connectors.
Each 8-pin PCIe power connector can deliver up to 150W, so all four combined in this custom configuration match the 16-pin connector’s maximum capacity of 600W. However, this configuration addresses concerns with the 16-pin power connector, which channels 50A through a small, tightly packed set of pins. The power-conversion kit instead spreads the load across four 8-pin PCIe power connectors, which are physically larger and allow a wider pin pitch.
While 8-pin PCIe power connectors are not entirely immune to melting or other power-related failures, such incidents are far less common than issues with 16-pin power connectors. The 16-pin power connector is significantly more compact than a single 8-pin power connector and carries 4X the wattage, so it is more prone to higher current density and heat buildup.
According to PCI-SIG specifications, each of the six power pins inside the 16-pin power connector is rated for a maximum current of 9.5A. This means that, in theory, the power connector's total capacity reaches up to 684W or 57A. For example, 600W (50A) requires each power pin to carry about 8.33A, which is already close to the recommended safety limits.
Modder 'fixes' melting RTX 5090 power connectors with custom distributor
Key considerations
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Reference reading
- https://www.tomshardware.com/pc-components/gpus/SPONSORED_LINK_URL
- https://www.tomshardware.com/pc-components/gpus/quad-8-pin-mod-protects-the-usd8-500-rtx-5090-you-cant-replace-from-melting-modders-custom-power-solution-claims-to-fix-nvidia-16-pin-gpu-meltdowns#main
- https://www.tomshardware.com/membership
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Informational only. No financial advice. Do your own research.