Enma45, independent reviews should come out on January 28.
notebookcheck.net/Intel-Lunar-Lake-iGPU-analysis-Arc-Graphics-140V-is-faster-and-more-efficient-than-Radeon-890M.894167.0.html
When limited to 28W, Arc Graphics 140V and Radeon 890M are on par in energy efficiency.
But:
QuoteIn addition to delivering high performance, Intel has also managed to enhance the efficiency of the Arc Graphics 140V. First, we examined Cyberpunk 2077, which had a huge advantage over other iGPUs, including the Snapdragon GPUs. The lead over the Radeon 890M in the Zenbook S 16 is an impressive 66%.
notebookcheck.net/Intel-unveils-Panther-Lake-iGPU-with-lofty-performance-gains-over-Lunar-Lake.1134160.0.html
notebookcheck.net/Intel-Panther-Lake-CPUs-bring-up-to-16-new-cores-30-better-efficiency-and-next-gen-Xe3-iGPU.1134710.0.html
If Intel's claims^ about Panther Lake's power efficiency are true (that's a big IF), then Intel is going to beat AMD's RDNA3.5 iGPU in power efficiency in every power consumption scenario.
Desktop RDNA4 is only 7-10% more power efficient than desktop RDNA3, so even if AMD releases RDNA4 iGPUs in CES 2027, it's not going to be enough to catch up to Panther Lake?