ARM Cortex-X4

ARM Cortex-X4
General information
Launched2023
Designed byARM Ltd.
Performance
Address width40-bit
Physical specifications
Cores
  • 1–10 (per cluster)
Cache
L1 cache128 KiB
(64 KiB I-cache with parity,
64 KiB D-cache) per core
L2 cache512–2048 KiB per core
L3 cache512 KiB – 32 MiB (optional)
Architecture and classification
MicroarchitectureARM Cortex-X4
Instruction setARMv9.2-A
Products, models, variants
Product code name
  • "Hunter ELP"
Variant
History
PredecessorARM Cortex-X3
SuccessorARM Cortex-X925

The ARM Cortex-X4 is a high-performance CPU core from Arm, released in 2023 as part of Arm's "total compute solution". It serves as the successor of ARM Cortex-X3.

X-series CPU cores generally focus on high performance, and can be grouped with other ARM cores, such as ARM Cortex-A720 or/and ARM Cortex-A520 in a System-on-Chip (SoC).

Architecture changes in comparison with ARM Cortex-X3

The processor implements the following changes:

Performance claims:

Architecture comparison

"Prime" core
uArch Cortex-A78 Cortex-X1 Cortex-X2 Cortex-X3 Cortex-X4 Cortex-X925
Code name Hercules Hera Matterhorn-ELP Makalu-ELP Hunter-ELP Blackhawk
Architecture ARMv8.2 ARMv9 ARMv9.2
Peak clock speed ~3.0 GHz ~3.3 GHz ~3.4 GHz ~3.8 GHz
Decode width 4 5 6 10
Dispatch 6/cycle 8/cycle 10/cycle
Max in-flight 2x 160 2x 224 2x 288 2x 320 2x 384 2x 768
L0 (Mops entries) 1536 3072 1536 0
L1-I + L1-D 32+32 KiB 64+64 KiB
L2 128–512 KiB 0.25–1 MiB 0.5–2 MiB 2–3 MiB
L3 0–8 MiB 0–16 MiB 0–32 MiB

Usage

See also