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 ARM Cortex-X2 in smartphones (3.3GHz, 1MB L2, 8MB L3). 11% IPC uplift over the ARM Cortex-X2, when based on the same process, clock speed, and cache setup (also known as ISO-process).
Usage Google • Tensor G3 MediaTek • Dimensity 9200 Qualcomm • Snapdragon 8 Gen 2
Architecture comparison
"Prime" core uArchCortex-A78Cortex-X1Cortex-X2Cortex-X3Cortex-X4Cortex-X925Code nameHerculesHeraMatterhorn-ELPMakalu-ELPHunter-ELPBlackhawkArchitectureARMv8.2ARMv9ARMv9.2Peak clock speed~3.0 GHz~3.3 GHz~3.4 GHz~3.8 GHzDecode width45610Dispatch 6/cycle8/cycle10/cycleMax in-flight2x 1602x 2242x 2882x 3202x 3842x 768L0 (Mops entries)1536307215360L1-I + L1-D32+32 KiB64+64 KiBL2 128–512 KiB0.25–1 MiB0.5–2 MiB2–3 MiBL30–8 MiB0–16 MiB0–32 MiB
See also ARM Cortex-A715, related high performance microarchitecture Comparison of ARMv8-A cores, ARMv8 family
References