Home Comparison Intel Core Ultra 7 255HX vs Intel Core i7 8559U

Intel Core Ultra 7 255HX vs Intel Core i7 8559U

Intel Core Ultra 7 255HX
VS
Intel Core i7 8559U
Intel Core Ultra 7 255HX
Intel Core i7 8559U
We compared two laptop CPUs: Intel Core Ultra 7 255HX with 20 cores 2.4GHz and Intel Core i7 8559U with 4 cores 2.7GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core Ultra 7 255HX 's Advantages
Released 6 years and 9 months late
Higher specification of memory (6400 vs 2400)
Larger memory bandwidth (102.4GB/s vs 37.5GB/s)
Larger L3 cache size (24MB vs 8MB)
More modern manufacturing process (3nm vs 14nm)
Intel Core i7 8559U 's Advantages
Higher base frequency (2.7GHz vs 2.4GHz)
Lower TDP (28W vs 55W)

Score

Intel Core Ultra 7 255HX
VS
Intel Core i7 8559U

General Parameters

Jan 2025
Release Date
Apr 2018
Intel
Manufacturer
Intel
Laptop
Type
Laptop
Arrow Lake
Core Architecture
Kaby Lake-R
Intel Socket 1851
Socket
Intel BGA 1356
Arc Xe-LPG
Integrated Graphics
Iris Pro Plus
Ultra 7 (Arrow Lake)
Generation
Core i7 (Kaby Lake-U Refresh)

Package

3 nm
Manufacturing Process
14 nm
17-55 W
Power Consumption
28 W
100 °C
Peak Operating Temperature
72 °C
Intel
Foundry
Intel
-
Die Size
123 mm²

CPU Performance

8
Performance Cores
-
8
Performance Core Threads
-
2.4 GHz
Performance Core Base Frequency
2.7 GHz
5.2 GHz
Performance Core Turbo Frequency
4.5 GHz
12
Efficiency Cores
-
12
Efficiency Core Threads
-
1.8 GHz
Efficiency Core Base Frequency
-
4.5 GHz
Efficiency Core Turbo Frequency
-
20
Total Core Count
4
20
Total Thread Count
8
100 MHz
Bus Frequency
100 MHz
24
Multiplier
27.0
112 KB per core
L1 Cache
64 KB per core
23 MB
L2 Cache
256 KB per core
24 MB shared
L3 Cache
8 MB shared
No
Unlocked Multiplier
No
1
SMP
1

Memory Parameters

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

Graphics Card Parameters

true
Integrated Graphics
true
-
GPU Base Frequency
300 MHz
1900 MHz
GPU Max Dynamic Frequency
1200 MHz
64
Execution Units
-

Miscellaneous

Official Website
Intel Core i7 8559U
5
PCIe Version
-
PCIe Lanes
-

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