The graphic card reaches an insanely hot 150C temperature with a 12V-2×6 power cable.
Read more: https://www.tweaktown.com/news/103780/nvidias-new-geforce-rtx-5090-has-its-12v-2×6-power-connector-hitting-an-insane-150c-temp/index.html
https://www.tomshardware.com/pc-components/gpus/rtx-5090-cable-overheats-to-150-degrees-celsius-uneven-current-distribution-likely-the-culprit