They're very close actually, at least at stock frequency. https://www.guru3d.com/articles_pages/amd_ryzen_9_7900_processor_review,6.html https://www.guru3d.com

They're very close actually, at least at stock frequency. https://www.guru3d.com/articles_pages/amd_ryzen_9_7900_processor_review,6.html https://www.guru3d.com/articles_pages/amd_ryzen_9_7900_proce... Both Intel 12900k and AMD 7900 are 78W idle. So it's basically neck-and-neck on idle power because those CPUs are around the same performance. Where the power usage is crazy different is multicore load, 320W for the Intel vs 158W for AMD. edit: actually an AMD 7900X is 299W on MC load. A 7900X is 15% faster on MC than a 7900. So Intel and AMD seem quite similar on power usage.