TLDR: The ARM Cortex-X3 is a high-performance CPU core designed by Arm. It offers improved performance and efficiency compared to its predecessor, the Cortex-X2. It is used in processors like the MediaTek Dimensity 9200 and Qualcomm Snapdragon 8 Gen 2.

The ARM Cortex-X3 is a third-generation CPU core in the X-series lineup developed by Arm. It was launched in 2022 and is designed to deliver high-performance computing power. Arm is a company that specializes in designing microprocessors and other technology components.

Compared to its predecessor, the Cortex-X2, the Cortex-X3 offers several improvements. It provides a 25% peak performance improvement, meaning it can handle more tasks and calculations at a faster speed. It also has an 11% increase in IPC (Instructions Per Cycle) uplift, which means it can execute instructions more efficiently.

The Cortex-X3 is used in various processors, including the MediaTek Dimensity 9200 and Qualcomm Snapdragon 8 Gen 2. These processors are commonly found in smartphones and other devices that require high-performance computing capabilities.

In summary, the ARM Cortex-X3 is a powerful CPU core designed by Arm. It offers improved performance and efficiency compared to its predecessor, making it suitable for high-performance computing tasks. It is used in processors like the MediaTek Dimensity 9200 and Qualcomm Snapdragon 8 Gen 2.