Product Compare

Intel Core Ultra 7 255H vs Intel Core i7 8557U

	CPU Intel Core Ultra 7 255H	CPU Intel Core i7 8557U
General Parameters
Release Date	Jan 2025	Jul 2019
Manufacturer	Intel	Intel
Type	Laptop	Laptop
Instruction Set	x86-64	x86-64
Core Architecture	Arrow Lake	Coffee Lake
Processor Number	255H	i7-8557U
Integrated Graphics	Arc Graphics 140T	Iris Plus Graphics 645
Package
Manufacturing Process	3 nm	14 nm
Socket	FCBGA-2049	BGA-1528
Power Consumption	20-28 W	15 W
Max Turbo Power Consumption	115 W
Peak Operating Temperature	110 °C	100 °C
CPU Performance
Performance Cores	6	4
Performance Core Threads	6	8
Performance Core Base Frequency	2.0 GHz	1.7 GHz
Performance Core Turbo Frequency	5.1 GHz	4.5 GHz
Efficiency Cores	10
Efficiency Core Threads	10
Efficiency Core Base Frequency	1.5 GHz
Efficiency Core Turbo Frequency	4.4 GHz
Total Core Count	16	4
Total Thread Count	16	8
Bus Frequency	100 MHz
Multiplier	20	17x
L1 Cache	112 K per core	32 K per core
L2 Cache	2 MB per core	256 K per core
L3 Cache	24 MB shared	8 MB shared
Unlocked Multiplier	No	No
Memory Parameters
Memory Types	LPDDR5-8400,LPDDR5x-8400,DDR5-6400	DDR4-2400, LPDDR3-2133
Max Memory Size	128 GB	32 GB
Max Memory Channels	2	2
ECC Memory Support	No	No
Max Memory Bandwidth		37.5 GB/s
Graphics Card Parameters
Integrated Graphics	true	true
GPU Max Dynamic Frequency	2250 MHz	1150 MHz
GPU Base Frequency		300 MHz
Shader Units		384
Texture Units		48
Raster Operation Units		6
Execution Units		48
Power Consumption		15 W
Max Resolution		4096x2304 - 60 Hz
Miscellaneous
Official Website	Official Link ↗	Official Link ↗
PCIe Version	5.0	3.0
PCIe Lanes	28	16
Extended Instruction Set		SSE4.1, SSE4.2, AVX-2