Intel Core Ultra 7 251HX vs Intel Core i9 11900K
CPU · Specs Compare
General Parameters
Release Date
Apr 2026
Mar 2021
Manufacturer
Intel
Intel
Type
Laptop
Desktop
Instruction Set
x86-64
x86-64
Core Architecture
Arrow Lake
Rocket Lake
Processor Number
251HX
i9-11900K
Integrated Graphics
Arc Graphics (4-Cores)
UHD Graphics 750
Package
Manufacturing Process
3 nm
14 nm
Socket
FCBGA-2114
LGA-1200
Power Consumption
45-55 W
125 W
Max Turbo Power Consumption
160 W
—
Peak Operating Temperature
105 °C
100°C
CPU Performance
Performance Cores
6
8
Performance Core Threads
6
16
Performance Core Base Frequency
2.9 GHz
3.5 GHz
Performance Core Turbo Frequency
5.1 GHz
5.3 GHz
Efficiency Cores
12
—
Efficiency Core Threads
12
—
Efficiency Core Base Frequency
2.5 GHz
—
Efficiency Core Turbo Frequency
4.5 GHz
—
Total Core Count
18
8
Total Thread Count
18
16
Bus Frequency
100 MHz
100 MHz
Multiplier
29
35x
L1 Cache
192 K per core
64 K per core
L2 Cache
2 MB per core
512 K per core
L3 Cache
30 MB shared
16 MB shared
Unlocked Multiplier
Yes
Yes
Memory Parameters
Memory Types
DDR5-6400
DDR4-3200
Max Memory Size
256 GB
128 GB
Max Memory Channels
2
2
Max Memory Bandwidth
102.4 GB/s
50 GB/s
ECC Memory Support
No
No
Graphics Card Parameters
Integrated Graphics
true
true
GPU Base Frequency
300 MHz
300 MHz
GPU Max Dynamic Frequency
1800 MHz
1300 MHz
Shader Units
512
256
Texture Units
32
64
Raster Operation Units
16
32
Execution Units
64
32
Power Consumption
14
15 W
Max Resolution
—
3840x2160 - 60 Hz
Miscellaneous
PCIe Version
5.0
4.0
PCIe Lanes
24
20
Benchmark
Geekbench 6
2,940
2,492
Geekbench 6
15,262
11,197
Cinebench 2024
130
—
Cinebench 2024
1,761
—
Cinebench R23
—
1,653
Cinebench R23
—
16,211
Geekbench 5
—
1,829
Geekbench 5
—
11,033
Blender
—
205
Passmark CPU
—
3,520
Passmark CPU
—
25,343
▲ Specs Compare
Data sourced from official specifications and benchmark tests.