RTX 5080 hits 104°C hotspot running diffusion models while core stays under 80°C
marriageruinedthrow · reddit · 2026-10-29
A Redditor reports their RTX 5080 stays at or below 80°C core temp, but hotspot temps reach 100–104°C when running certain diffusion models: MiniMax H3 drives fans wild during the VAE stage, and MOSS shows surprising hotspot readings too.
Questions raised: (1) is the hotspot spike harmful beyond fan noise; (2) practical longevity steps without disassembling the card, e.g. undervolting or fan curves; (3) other tips. Useful reference for anyone running local video generation and monitoring GPU thermals.
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