Intel Core Ultra 7 255HX vs Intel Core Ultra 5 135U
We compared two laptop CPUs: Intel Core Ultra 7 255HX with 20 cores 2.4GHz and Intel Core Ultra 5 135U with 12 cores 1.6GHz . 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 1 years and 1 months late
Newer PCIe version (5.0 vs 4.0)
Higher base frequency (2.4GHz vs 1.6GHz)
Larger L3 cache size (30MB vs 12MB)
More modern manufacturing process (3nm vs 7nm)
Lower TDP (55W vs 57W)
Intel Core Ultra 5 135U 's Advantages
Better graphics card performance
Higher specification of memory (7467 vs 6400)
Larger memory bandwidth (120GB/s vs 102.4GB/s)
Score
Benchmark
Cinebench R23 Single Core
Intel Core Ultra 7 255HX
+21%
2030
Intel Core Ultra 5 135U
1676
Cinebench R23 Multi Core
Intel Core Ultra 7 255HX
+195%
25611
Intel Core Ultra 5 135U
8654
Geekbench 6 Single Core
Intel Core Ultra 7 255HX
+46%
3102
Intel Core Ultra 5 135U
2111
Geekbench 6 Multi Core
Intel Core Ultra 7 255HX
+82%
15879
Intel Core Ultra 5 135U
8695
General Parameters
Jan 2025
Release Date
Dec 2023
Intel
Manufacturer
Intel
Laptop
Type
Laptop
x86-64
Instruction Set
x86-64
Arrow Lake
Core Architecture
Meteor Lake
255HX
Processor Number
135U
FCBGA-2114
Socket
FCBGA-2049
Arc Graphics (4-Cores)
Integrated Graphics
Arc Graphics (4-Cores)
Ultra 7 (Arrow Lake)
Generation
Ultra 5 (Meteor Lake)
Package
3 nm
Manufacturing Process
7 nm
45-55 W
Power Consumption
12-57 W
160 W
Max Turbo Power Consumption
-
105 °C
Peak Operating Temperature
110°C
Intel
Foundry
Intel
CPU Performance
8
Performance Cores
2
8
Performance Core Threads
4
2.4 GHz
Performance Core Base Frequency
1.6 GHz
5.2 GHz
Performance Core Turbo Frequency
4.4 GHz
12
Efficiency Cores
10
12
Efficiency Core Threads
10
1.8 GHz
Efficiency Core Base Frequency
1.1 GHz
4.5 GHz
Efficiency Core Turbo Frequency
3.6 GHz
20
Total Core Count
12
20
Total Thread Count
14
100 MHz
Bus Frequency
100 MHz
24
Multiplier
16x
112 K per core
L1 Cache
112 K per core
2 MB per core
L2 Cache
2 MB per core
30 MB shared
L3 Cache
12 MB shared
Yes
Unlocked Multiplier
No
1
SMP
1
Memory Parameters
DDR5-6400
Memory Types
LPDDR5-7467, LPDDR5x-7467, DDR5-5600
192 GB
Max Memory Size
96 GB
2
Max Memory Channels
2
102.4 GB/s
Max Memory Bandwidth
120 GB/s
Yes
ECC Memory Support
No
Graphics Card Parameters
true
Integrated Graphics
true
300 MHz
GPU Base Frequency
300 MHz
1850 MHz
GPU Max Dynamic Frequency
1900 MHz
512
Shader Units
512
32
Texture Units
32
16
Raster Operation Units
16
64
Execution Units
64
14
Power Consumption
14 W
-
Max Resolution
7680x4320 - 60 Hz
1.9 TFLOPS
Graphics Performance
1.95 TFLOPS
Miscellaneous
5.0
PCIe Version
4.0
24
PCIe Lanes
20
