Intel Core Ultra 7 251HX vs Intel Core i7 7820X
CPU Specs Compare
General Parameters
Release Date
Apr 2026
May 2017
Manufacturer
Intel
Intel
Type
Laptop
Desktop
Instruction Set
x86-64
x86-64
Core Architecture
Arrow Lake
Skylake
Processor Number
251HX
i7-7820X
Integrated Graphics
Arc Graphics (4-Cores)
N/A
Package
Manufacturing Process
3 nm
14 nm
Socket
FCBGA-2114
LGA-2066
Power Consumption
45-55 W
140 W
Max Turbo Power Consumption
160 W
-
Peak Operating Temperature
105 °C
99 °C
CPU Performance
Performance Cores
6
8
Performance Core Threads
6
16
Performance Core Base Frequency
2.9 GHz
3.6 GHz
Performance Core Turbo Frequency
5.1 GHz
4.3 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
36x
L1 Cache
192 K per core
64 K per core
L2 Cache
2 MB per core
1 MB per core
L3 Cache
30 MB shared
11 MB shared
Unlocked Multiplier
Yes
Yes
Memory Parameters
Memory Types
DDR5-6400
DDR4-2666
Max Memory Size
256 GB
128 GB
Max Memory Channels
2
4
Max Memory Bandwidth
102.4 GB/s
79.47 GB/s
ECC Memory Support
No
No
Graphics Card Parameters
Integrated Graphics
true
-
GPU Base Frequency
300 MHz
-
GPU Max Dynamic Frequency
1800 MHz
-
Shader Units
512
-
Texture Units
32
-
Raster Operation Units
16
-
Execution Units
64
-
Power Consumption
14
-
Miscellaneous
📊 Benchmark
Geekbench 6
2,940
1,252
Geekbench 6
15,262
7,510
Cinebench 2024
130
-
Cinebench 2024
1,761
-
Cinebench R23
-
1,338
Cinebench R23
-
13,358
Geekbench 5
-
1,120
Geekbench 5
-
8,504
Passmark CPU
-
2,536
Passmark CPU
-
17,189