ARM Cortex-X3
The ARM Cortex-X3 is the third generation X-series high-performance CPU core from Arm. It forms part of Arm's Total Compute Solutions 2022 (TCS22) along with Arm's Cortex-A715, Cortex-A510, Immortalis-G715 and CoreLink CI-700/NI-700. Architecture changes in comparison with ARM Cortex-X2 
The processor implements the following changes:
 Decode width: 6 (increased from 5)
 Rename / Dispatch width: 8
 micro-op (MOP) cache: 1.5k entries (reduced from 3k)
 Reorder buffer (ROB): 320 entries (increased from 288)
 Execution ports: 15
 Pipeline length: 9 (reduced from 10)
Performance claims:
 25% peak performance improvement over the Cortex-X2 in smartphones (3.3GHz, 1MB L2, 8MB L3). 11% IPC uplift over the Cortex-X2, when based on the same process, clock speed, and cache setup (also known as ISO-process). 34% faster than an Intel Core i7-1260P (3.6GHz, 1MB L2, 16MB L3)

Usage 

 MediaTek Dimensity 9200
 Qualcomm Snapdragon 8 Gen 2

See also 

 ARM Cortex-A715, related high performance microarchitecture
 Comparison of ARMv8-A cores, ARMv8 family

References 

ARM processors