Intel Core i7 8557U vs Intel Core Ultra X9 388H
CPU · Specs Compare
General Parameters
Release Date
Jul 2019
Jan 2026
Manufacturer
Intel
Intel
Type
Laptop
Laptop
Instruction Set
x86-64
x86-64
Core Architecture
Coffee Lake
Panther Lake
Processor Number
i7-8557U
388H
Integrated Graphics
Iris Plus Graphics 645
Arc B390
Generation
—
Ultra X9 (Panther Lake-H)
Package
Manufacturing Process
14 nm
2 nm
Socket
BGA-1528
FCBGA2540
Power Consumption
15 W
15-25 W
Peak Operating Temperature
100 °C
100 °C
Max Turbo Power Consumption
—
80 W
Foundry
—
Intel
Package
—
FC-BGA
CPU Performance
Performance Cores
4
4
Performance Core Threads
8
4
Performance Core Base Frequency
1.7 GHz
2.1 GHz
Performance Core Turbo Frequency
4.5 GHz
5.1 GHz
Total Core Count
4
16
Total Thread Count
8
16
Multiplier
17x
21
L1 Cache
32 K per core
192 K per core
L2 Cache
256 K per core
2560 K per core
L3 Cache
8 MB shared
18 MB shared
Unlocked Multiplier
No
No
Efficiency Cores
—
12
Efficiency Core Threads
—
12
Efficiency Core Base Frequency
—
1.6 GHz
Efficiency Core Turbo Frequency
—
4 GHz
Bus Frequency
—
100 MHz
SMP
—
1
Memory Parameters
Memory Types
DDR4-2400, LPDDR3-2133
LPDDR5X-9600
Max Memory Size
32 GB
96 GB
Max Memory Channels
2
2
Max Memory Bandwidth
37.5 GB/s
153.6 GB/s
ECC Memory Support
No
No
Graphics Card Parameters
Integrated Graphics
true
true
GPU Base Frequency
300 MHz
300 MHz
GPU Max Dynamic Frequency
1150 MHz
2500 MHz
Shader Units
384
1536
Texture Units
48
48
Raster Operation Units
6
24
Execution Units
48
12
Power Consumption
15 W
45
Max Resolution
4096x2304 - 60 Hz
—
Miscellaneous
PCIe Version
3.0
5.0
PCIe Lanes
16
12
Extended Instruction Set
SSE4.1, SSE4.2, AVX-2
—
AI Accelerator
Theoretical performance
—
50 TOPS
Benchmark
Geekbench 6
—
3,026
Geekbench 6
—
17,541
Cinebench 2024
—
130
▲ Specs Compare
Data sourced from official specifications and benchmark tests.