Intel Core i5 8400H vs Intel Core i7 1255U
CPU Specs Compare
General Parameters
Release Date
Apr 2018
Feb 2022
Manufacturer
Intel
Intel
Type
Laptop
Laptop
Instruction Set
x86-64
x86-64
Core Architecture
Coffee Lake
Alder Lake
Processor Number
i5-8400H
i7-1255U
Integrated Graphics
UHD Graphics 630
Iris Xe Graphics (96EU)
Package
Manufacturing Process
14 nm
10 nm
Socket
BGA-1440
BGA-1744
Power Consumption
45 W
12-15 W
Peak Operating Temperature
100 °C
100°C
Max Turbo Power Consumption
-
55 W
CPU Performance
Performance Cores
4
2
Performance Core Threads
8
4
Performance Core Base Frequency
2.5 GHz
1.7 GHz
Performance Core Turbo Frequency
4.2 GHz
4.7 GHz
Total Core Count
4
10
Total Thread Count
8
12
Bus Frequency
100 MHz
100 MHz
Multiplier
25x
17x
L1 Cache
64 K per core
80 K per core
L2 Cache
256 K per core
1280 K per core
L3 Cache
8 MB shared
12 MB shared
Unlocked Multiplier
No
No
Efficiency Cores
-
8
Efficiency Core Threads
-
8
Efficiency Core Base Frequency
-
1.2 GHz
Efficiency Core Turbo Frequency
-
3.5 GHz
Memory Parameters
Memory Types
DDR4-2666, LPDDR3-2133
DDR5-4800, DDR4-3200, LPDDR5-5200, LPDDR4x-4267
Max Memory Size
64 GB
64 GB
Max Memory Channels
2
2
Max Memory Bandwidth
41.8 GB/s
76.8 GB/s
ECC Memory Support
No
No
Graphics Card Parameters
Integrated Graphics
true
true
GPU Base Frequency
350 MHz
300 MHz
GPU Max Dynamic Frequency
1100 MHz
1250 MHz
Shader Units
192
768
Texture Units
24
48
Raster Operation Units
3
24
Execution Units
24
96
Power Consumption
15 W
15 W
Max Resolution
4096x2304 - 60 Hz
-
Miscellaneous
📊 Benchmark
Cinebench R23
1,060
1,701
Cinebench R23
4,035
8,233
Geekbench 6
1,213
2,248
Geekbench 5
1,075
1,628
Geekbench 6
3,109
7,162
Geekbench 5
3,884
7,372
Blender
48
125
Passmark CPU
2,416
3,308
Passmark CPU
7,914
13,792