ARM Cortex-X3

ARM Cortex-X3

General information
Launched	2022
Designed by	Arm
Performance
Max. CPU clock rate	to 3.3 GHz in phones and 3.6 GHz in laptops
Address width	40-bit
Cache
L1 cache	128 KiB (64 KiB I-cache with parity, 64 KiB D-cache) per core
L2 cache	512–1024 KiB per core
L3 cache	512 KiB – 16 MiB (optional)
Architecture and classification
Instruction set	ARMv9.0-A
Physical specifications
Cores	1–8 per cluster
Products, models, variants
Product code name	Makalu ELP
Variant	ARM Cortex-A715 Neoverse V2
History
Predecessor	ARM Cortex-X2
Successor	ARM Cortex-X4

The ARM Cortex-X3 is the third generation X-series high-performance CPU core from Arm.^[1][2][3] 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.^[4]

The processor implements the following changes:^[1][5][6]

• 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).^[1][7]
• 11% IPC uplift over the Cortex-X2, when based on the same process, clock speed, and cache setup (also known as ISO-process).^[3]

• MediaTek Dimensity 9200^[8]
• Qualcomm Snapdragon 8 Gen 2^[9]
• Google Tensor G3

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