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: Performance claims:
 * 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)
 * 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).

Usage

 * MediaTek Dimensity 9200
 * Qualcomm Snapdragon 8 Gen 2
 * Google Tensor G3