Intel Core i7 1255U vs AMD Ryzen 7 8840HX
We compared two laptop CPUs: Intel Core i7 1255U with 10 cores 1.7GHz and AMD Ryzen 7 8840HX with 12 cores 2.9GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.
Main Differences
Intel Core i7 1255U 's Advantages
Integrated graphics card
Lower TDP (15W vs 55W)
AMD Ryzen 7 8840HX 's Advantages
Released 3 years and 2 months late
Higher specification of memory (5200 vs 5200)
Newer PCIe version (5 vs 4.0)
Higher base frequency (2.9GHz vs 1.7GHz)
Larger L3 cache size (64MB vs 12MB)
More modern manufacturing process (5nm vs 10nm)
Score
General Parameters
Feb 2022
Release Date
Apr 2025
Intel
Manufacturer
AMD
Laptop
Type
Laptop
x86-64
Instruction Set
-
Alder Lake
Core Architecture
Dragon Range
i7-1255U
Processor Number
-
BGA-1744
Socket
AMD Socket FL1
Iris Xe Graphics (96EU)
Integrated Graphics
Radeon 610M
-
Generation
Ryzen 7 (Zen 4 (Dragon Range))
Package
-
Transistor Count
13.14 billions
10 nm
Manufacturing Process
5 nm
12-15 W
Power Consumption
55 W
55 W
Max Turbo Power Consumption
-
100°C
Peak Operating Temperature
100°C
-
Foundry
TSMC
-
Die Size
2x71 mm²
-
I/O Process Size
6 nm
-
I/O Die Size
122 mm²
CPU Performance
2
Performance Cores
-
4
Performance Core Threads
-
1.7 GHz
Performance Core Base Frequency
2.9 GHz
4.7 GHz
Performance Core Turbo Frequency
5.1 GHz
8
Efficiency Cores
-
8
Efficiency Core Threads
-
1.2 GHz
Efficiency Core Base Frequency
-
3.5 GHz
Efficiency Core Turbo Frequency
-
10
Total Core Count
12
12
Total Thread Count
24
100 MHz
Bus Frequency
100 MHz
17x
Multiplier
29.0
80 K per core
L1 Cache
64 KB per core
1280 K per core
L2 Cache
1 MB per core
12 MB shared
L3 Cache
64 MB shared
No
Unlocked Multiplier
Yes
-
SMP
1
Memory Parameters
DDR5-4800, DDR4-3200, LPDDR5-5200, LPDDR4x-4267
Memory Types
DDR5-5200
64 GB
Max Memory Size
-
2
Max Memory Channels
2
76.8 GB/s
Max Memory Bandwidth
-
No
ECC Memory Support
No
Graphics Card Parameters
true
Integrated Graphics
-
300 MHz
GPU Base Frequency
-
1250 MHz
GPU Max Dynamic Frequency
-
768
Shader Units
-
48
Texture Units
-
24
Raster Operation Units
-
96
Execution Units
-
15 W
Power Consumption
-
1.69 TFLOPS
Graphics Performance
-
