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Key specs
Cores
18
Threads
18
Boost Clock
5.1 GHz
TDP
45-55 W (configurable)
Socket
FCBGA-2114
Process
3 nm
Benchmarks
Rating
75
Perf.
76
iGPU
51
Energy
78
Cinebench 2024 Single-Core
130
Cinebench 2024 Multi-Core
1762
TDP
45-55 W
Cache L3
30MB
Cinebench 2024 (Single)
130
Cinebench 2024 (Multi)
1762
Geekbench 6 (Single-Core)
2940
Geekbench 6 (Multi-Core)
15,277
Passmark CPU (Single-Core)
4367
Passmark CPU (Multi-Core)
46,729
iGPU FLOPS
1.8 TFLOPS
PassMark
Integer math
122 GOps/sec
Floating point math
152.1 GOps/sec
Find prime numbers
440M Primes/sec
Random string sorting
61.6M Strings/sec
Data encryption
39.2 GBytes/sec
Data compression
512.7 MBytes/sec
Physics
2500 Frames/sec
Extended instructions
39.9B Matrices/sec
Performance Per Watt
Cinebench 2024 / Watt
32 PPW
Geekbench 6 Multi / Watt
277.8 PPW
Passmark CPU Mark / Watt
849.6 PPW
General
Vendor
Intel
Released
April 1, 2026
Type
Laptop
Instruction Set
x86-64
Codename
Arrow Lake
Model number
251HX
Integrated GPU
Arc Graphics (4-Cores)
CPU
P-Cores
6
P-Threads
6
Base Frequency (P)
2.9 GHz
Turbo Boost Frequency (P)
5.1 GHz
E-Cores
12
E-Threads
12
Base Frequency (E)
2.5 GHz
Turbo Boost Frequency (E)
4.5 GHz
Total Cores
18
Total Threads
18
Bus Frequency
100 MHz
Multiplier
29x
L1 Cache
192K (per core)
L2 Cache
2MB (per core)
L3 Cache
30MB (shared)
Unlocked Multiplier
Yes
Package
Fabrication Process
3 nm
TDP (PL1)
45-55 W (configurable)
Max. Boost TDP (PL2)
160 W
Socket
FCBGA-2114
Peak Temperature
105°C
iGPU
Integrated Graphics
Arc Graphics (4-Cores)
GPU Base Clock
300 MHz
GPU Boost Clock
1800 MHz
Shading Units
512
TMUs
32
ROPs
16
Execution Units
64
TGP
14 W
Memory Support
Memory Types
- DDR5-6400
Max. Memory Size
256 GB
Memory Channels
2
Max. Memory Bandwidth
102.4 GB/s
ECC Support
No
Misc
Official Site
Intel Core Ultra 7 251HX official page
PCI Express Version
5.0
PCI Express Lanes
24