UPDATE:MediaTek has informed us that the source we used in this article (Android Headlines) posted a story it says is not true. A MediaTek spokesperson tells us, “The rumor started by Android Headlines about MediaTek’s yet to be announced chipset is completely false and has no source or basis in fact.”
The original story follows:
With a configuration that reportedly does away with any efficiency CPU cores and is made up of four Cortex-X4 prime cores and four Cortex-A720 performance cores, the unannounced MediaTek Dimensity 9300 SoC on paper would seem to be a hot number. Maybe too hot. While most chipsets will include some low-power efficiency cores (Cortex A-5xx), MediaTek has designed a component made to deliver power and speed. But that might come at a price as the component could get too hot.

The Dimensity 9300’s unique configuration is making it a hot chip
The Cortex-A720 core found in the Dimensity 9300 is said to be 20% more efficient than the previous generation A715 core. The Cortex-X4 prime core delivers a 15% increase in performance compared with the previous generation Cortex-X3. And the Dimensity 9300 will employ ARM’s Immortalis-G720 GPU which hikes performance by 15% while using 40% less memory bandwidth. The Dimensity 9300 is expected to be built by TSMC using its 4nm process node.
منبع: https://www.phonearena.com/news/dimensity-9300-overheats_id150535