On my retail ROG Astral RTX 5080 OC, four single-stream Ollama decode profiles stayed between 265.2 and 343.6 W board power, but efficiency varied nearly 4×:

  • Llama 3.2 3B Q4_K_M: 318.3 tok/s at 265.2 W = 1.20 tok/J
  • gpt-oss 20B MXFP4: 194.4 tok/s at 292.4 W = 0.67 tok/J
  • Qwen 2.5 7B Q4_K_M: 182.2 tok/s at 343.6 W = 0.53 tok/J
  • Qwen 2.5 14B Q4_K_M: 98.8 tok/s at 311.6 W = 0.32 tok/J

Method: 1 Hz nvidia-smi telemetry, loaded samples only (≥50% utilization), with three fresh-prompt iterations per model. These are board-power results from one card and one Windows setup, not whole-system draw or universal RTX 5080 figures.

The same setup measured 52–71 W at the desktop with multi-monitor output holding P0. In a separate model using 18 idle hours/day, ~60 W GPU idle plus a 50 W rest-of-system allowance contributes about 723 kWh/year. Raw CSVs, assumptions, and full method: https://techfuelhq.com/articles/rtx-5080-perf-per-watt-ai-24-7-2026/

What idle draw and P-state does your RTX 5080 settle at once the monitors sleep?

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