After one of its cables was blamed in the first credible report of an RTX 5090 power connector melting, third-party power supply cable maker Moddiy has warned RTX 50-series (Blackwell) GPU owners not to use its old 12VHPWR custom cables made before 2025 with Nvidia's latest Blackwell GPUs. In a support page detailing the matter, Moddiy says that all of its cables made in 2025 have been validated for the RTX 50-series, but the 2024 and earlier cables are another matter.
Moddiy's 2025 cables have been upgraded to cope with the higher power requirements of the RTX 50-series, specifically the RTX 5090 and RTX 5090D. Its new 2025 cables reportedly incorporate "significant advancements," such as enhanced terminal and connector housing materials and thicker wires. These changes have been made to provide an additional safety buffer and prevent accidents.
The new 2025 cables are also manufactured according to the latest 12V-2x6 specification. Older cables made in 2024 or earlier were based on the original 12VHPWR standard.
The support page provides a listing of new cables with RTX 50-series support that Moddiy is producing. The new cable has all the bells and whistles, sporting ATX 3.1 and PCIe 5.1 support, a 675W power rating, and a 12V-2x6 specification. Critically, it has the latest "H++" moniker, the identification for cables boasting the upgraded 12V-2x6 power spec. Cables featuring the "H+" identification were designed with the older 12VHPWR power spec in mind.
