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AMD RX7900XTX GPU power profiles tested for LLM performance

A user on Reddit's r/LocalLLaMA subreddit tested power profiles for the AMD RX7900XTX GPU using ROCm 7. The user found that a "quiet mode" significantly reduced power consumption by approximately 99W, resulting in a drop of about 9.4% in generation speed and 17.1% in long-context prefill speed. This power reduction also led to a decrease of around 11C in average junction temperature. AI

IMPACT Demonstrates trade-offs between power consumption, temperature, and LLM performance on specific hardware.

RANK_REASON User-conducted benchmark of hardware performance for AI workloads. [lever_c_demoted from research: ic=1 ai=0.7]

Read on r/LocalLLaMA →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

COVERAGE [1]

  1. r/LocalLLaMA TIER_1 English(EN) · /u/Thin_Pollution8843 ·

    Tested RX7900XTX with ROCm7 power profiles

    <!-- SC_OFF --><div class="md"><p>Was trying to lower temps using builtin ROCm profiles without going far (just use what amd can offer in latest drivers)</p> <p>lama.cpp config:</p> <pre><code>/home/user/ai/llama.cpp/build/bin/llama-bench \ -m /models/Qwen3.6-35B-A3B-UD-Q4_K_S.gg…