Home Comparison Intel Core i5 8257U vs Intel Core Ultra 7 255HX

Intel Core i5 8257U vs Intel Core Ultra 7 255HX

Intel Core i5 8257U
VS
Intel Core Ultra 7 255HX
Intel Core i5 8257U
Intel Core Ultra 7 255HX
We compared two laptop CPUs: Intel Core i5 8257U with 4 cores 1.4GHz and Intel Core Ultra 7 255HX with 20 cores 2.4GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core i5 8257U 's Advantages
Lower TDP (15W vs 55W)
Intel Core Ultra 7 255HX 's Advantages
Released 5 years and 6 months late
Higher specification of memory (6400 vs 2400)
Larger memory bandwidth (102.4GB/s vs 37.5GB/s)
Newer PCIe version (5 vs 3.0)
Higher base frequency (2.4GHz vs 1.4GHz)
Larger L3 cache size (24MB vs 6MB)
More modern manufacturing process (3nm vs 14nm)

Score

Intel Core i5 8257U
VS
Intel Core Ultra 7 255HX

General Parameters

Jul 2019
Release Date
Jan 2025
Intel
Manufacturer
Intel
Laptop
Type
Laptop
x86-64
Instruction Set
-
Coffee Lake
Core Architecture
Arrow Lake
i5-8257U
Processor Number
-
BGA-1528
Socket
Intel Socket 1851
Iris Plus Graphics 645
Integrated Graphics
Arc Xe-LPG
-
Generation
Ultra 7 (Arrow Lake)

Package

14 nm
Manufacturing Process
3 nm
15 W
Power Consumption
17-55 W
100 °C
Peak Operating Temperature
100 °C
-
Foundry
Intel

CPU Performance

4
Performance Cores
8
8
Performance Core Threads
8
1.4 GHz
Performance Core Base Frequency
2.4 GHz
3.9 GHz
Performance Core Turbo Frequency
5.2 GHz
-
Efficiency Cores
12
-
Efficiency Core Threads
12
-
Efficiency Core Base Frequency
1.8 GHz
-
Efficiency Core Turbo Frequency
4.5 GHz
4
Total Core Count
20
8
Total Thread Count
20
-
Bus Frequency
100 MHz
14x
Multiplier
24
32 K per core
L1 Cache
112 KB per core
256 K per core
L2 Cache
23 MB
6 MB shared
L3 Cache
24 MB shared
No
Unlocked Multiplier
No
-
SMP
1

Memory Parameters

DDR4-2400, LPDDR3-2133
Memory Types
DDR5-6400
32 GB
Max Memory Size
256 GB
2
Max Memory Channels
2
37.5 GB/s
Max Memory Bandwidth
102.4 GB/s
No
ECC Memory Support
Yes

Graphics Card Parameters

true
Integrated Graphics
true
300 MHz
GPU Base Frequency
-
1050 MHz
GPU Max Dynamic Frequency
1900 MHz
384
Shader Units
-
48
Texture Units
-
6
Raster Operation Units
-
48
Execution Units
64
15 W
Power Consumption
-
4096x2304 - 60 Hz
Max Resolution
-
0.81 TFLOPS
Graphics Performance
-

Miscellaneous

Intel Core i5 8257U
Official Website
3.0
PCIe Version
5
16
PCIe Lanes
SSE4.1, SSE4.2, AVX-2
Extended Instruction Set
-

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