RTX 5090 Mod Swaps 16-Pin Connector for Quad 8-Pin Kit
A user-built harness soldered to the card's power rails feeds up to 600W through four 8-pin PCIe connectors, according to Tom's Hardware.
Reddit user DallasGrave has shown off a custom quad 8-pin power conversion kit for the Nvidia GeForce RTX 5090 that bypasses the card's 16-pin connector, according to Tom's Hardware. The kit sits above the graphics card and uses a harness soldered to the card's PCB power rails.
The four 8-pin PCIe connectors together can deliver up to 600W, matching the maximum rating of the 16-pin connector they replace. With a 50A load spread across 12 pins, each pin carries about 4.17A — roughly half the per-pin current a 16-pin connector handles at the same load.
The design also tricks the 16-pin sense pins into seeing the full 600W, so the card behaves as if the standard connector were attached. The kit can run on its own or in parallel with the native 16-pin connection.
DallasGrave says the kit was tested up to 800W with a shunt mod. The user is developing a custom backplate and plans models covering nearly every RTX 5090 variant, including Nvidia's Founders Edition.
No release date, pricing or installation details have been announced. PCI-SIG specs rate each of the six power pins in the 16-pin connector at a maximum of 9.5A, for a theoretical total of up to 684W, or 57A.
Quick answers
What does the RTX 5090 quad 8-pin kit do?
It replaces the card's 16-pin power connection with four 8-pin PCIe connectors, which together can supply up to 600W.
Can I buy the quad 8-pin RTX 5090 kit?
No release date, pricing or installation details have been announced.
Does the kit work with all RTX 5090 cards?
DallasGrave plans models covering nearly every RTX 5090 variant, including Nvidia's Founders Edition, but none have been released yet.