Intel

8th Gen Intel Core i7 8557U

iGPU:: Intel Iris Plus Graphics 645
Boost/Base Clock:: 4.5 GHz / 1.7 GHz
Core/Thread Count:: 4 Core / 8 Thread
Cache:: 8MB L3 + 1MB L2 + 256KB L1
TDP:: 28 Watts
CPU Process Node:: 14 Nanometers
CPU Socket:: FCBGA1528
CPU Series:: Coffee Lake, 8th Gen Intel Core
Memory Support:: DDR4-2400, LPDDR3-2133
Form Factor:: Laptop

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Manufacturer: Intel Last updated: September 9, 2026

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8th Gen Intel Core i7 8557U Review

The 8th Gen Intel Core i7 8557U is a 4-core, 8-thread ultraportable processor built on Coffee Lake, running a 1.7 GHz base clock that boosts to 4.5 GHz within a 28 Watt TDP, paired with genuinely strong Iris Plus graphics.

The Iris Plus 645 graphics configuration was a real step up from standard UHD graphics of its era, making this chip a popular choice in premium ultraportables wanting better light creative and gaming capability.

Intel Iris Plus Graphics 645

A genuinely stronger integrated GPU than standard UHD graphics of its era, capable of handling light creative work and casual gaming more comfortably.

How Is the Core i7 8557U in Terms of Performance

The 4-core, 8-thread layout with a 28W power envelope gives this chip solid sustained performance for a premium ultraportable, with the strong Iris Plus graphics being a genuine differentiator over standard integrated graphics.

Benchmarks

Cinebench R20 single-core scores of 434 reflect solid per-core performance for a 28W ultraportable chip, appropriate for the premium thin-and-light laptops this processor commonly appeared in.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Best for

Premium ultraportable laptops wanting genuinely stronger integrated graphics than standard UHD configurations

Not for

Buyers needing dedicated gaming or heavy creative graphics capability, a discrete GPU remains necessary for that

Specifications

What these specs mean

Identity

Brand	Intel
Product Line	Core i7
Model Number	8557U
Codename	Coffee Lake
Release Year	2019

Segment and platform

Market Segment	Laptop
Microarchitecture	Coffee Lake, 8th Gen Intel Core
Socket	FCBGA1528
Process Node	14 nm

Core configuration

Total Cores	4
Performance Cores	4
Efficiency Cores	0
Total Threads	8
SMT Enabled	Yes

Clock speeds

P-Core Base Clock	1.7 GHz
P-Core Boost Clock	4.5 GHz

Cache

L2 Cache	1 MB
L3 Cache	8 MB

Power and thermal

Base Power	15 W

Memory

Memory Type	DDR4-2400, LPDDR3-2133

Graphics and AI

Integrated Graphics	Yes

Form Factor	Laptop
TDP	15 W
iGPU	Intel Iris Plus Graphics 645

FAQs

What are the key specifications of the 8th Gen Intel Core i7 8557U?

The 8th Gen Intel Core i7 8557U has 4 cores and 8 threads, a 1.7 GHz base and 4.5 GHz boost clock, 8 MB of L3 cache and a 15 W TDP. Integrated graphics: Intel Iris Plus Graphics 645. Socket: FCBGA1528.

Will the 8th Gen Intel Core i7 8557U work with my current setup?

The 8th Gen Intel Core i7 8557U lists CPU Socket is FCBGA1528. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.

Who is the 8th Gen Intel Core i7 8557U best suited to?

Best suited to: Premium ultraportable laptops wanting genuinely stronger integrated graphics than standard UHD configurations.

What are the drawbacks of the 8th Gen Intel Core i7 8557U?

Not the best fit for: Buyers needing dedicated gaming or heavy creative graphics capability, a discrete GPU remains necessary for that.