Reddit user Dallas Grave has modified an MSI GeForce RTX 5090 with two extra 8-pin PCIe power inputs alongside the card's original 16-pin connector. A small pickup PCB is soldered to the 16-pin header contacts, feeding a second PCB with the two 8-pin sockets. The card now runs on three cables total.
According to the modder, each conductor carries roughly 3 A, with wires never exceeding 40°C during a 48-hour test at 550 W. NVIDIA claimed the 12V-2x6 revision resolved melting issues in early 2025, but melted RTX 5090 Founders Edition units appeared shortly after, including one with an undervolt and -100 W power limit. Hardware Unboxed recently observed its RTX 5090 cable reaching 175°C with a single wire pulling 22 A.
Off-the-shelf solutions like ASUS's ROG Equalizer cable and ASRock's Temp Guard have also experienced failures. Modders continue developing fixes as commercial options show mixed results.
Source: TechPowerUp News · Summarized by HeadlinesBriefing