Recently, netizen Revegnus learned from Chinese sources that the ARM Cortex-X5 core consumes a lot of power when running at high frequencies, and if the heat dissipation is not good enough, it is easy to have high temperature frequency reduction, and the actual machine performance may be lower than expected. 
Previously, it was rumored that this year, MediaTek insisted on using the same "all-large core" CPU architecture as the Dimensity 9300, and used TSMC's second-generation 3nm process (N3E). The Dimensity 9400's "all-big-core" CPU architecture is likely to be a 1+3+4 three-plex architecture, which will introduce ultra-large cores based on Cortex-X5, including one Cortex-X5, three Cortex-X4 and four Cortex-A720, to further improve performance, hoping to beat rival Qualcomm's Snapdragon 8. If the Revegnus news is true, it seems reasonable that the Dimensity 9400 only introduces a Cortex-X5 super-large core. Qualcomm plans to introduce a custom Oryon core that integrates Nuvia technology into this year's flagship chip, abandoning the previous design based on the ARM public version, so it will not be affected by the ARM architecture. It is rumored that the Snapdragon 8 will also abandon the use of energy efficiency cores, using Qualcomm's customized 2 Nuvia Phoenix performance cores and 6 Nuvia Phoenix M cores of the new dual-cluster octa-core CPU architecture scheme, and it is also made in the N3E process, and it is said that the core frequency can be as high as 40ghz。
However, Qualcomm executives have hinted that the pricing of the chip will be higher, which means that various smartphone manufacturers may have to increase the price of the terminal to avoid a big impact on profit margins, and the performance of the Dimensity 9400 will largely affect the actual Snapdragon 8 model at that time.