Intel Core Ultra 7 255HX vs AMD Ryzen 5 PRO 8645HS

VS

Intel Core Ultra 7 255HX

AMD Ryzen 5 PRO 8645HS

We compared two laptop CPUs: Intel Core Ultra 7 255HX with 20 cores 2.4GHz and AMD Ryzen 5 PRO 8645HS with 6 cores 4.3GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core Ultra 7 255HX 's Advantages

Released 9 months late

Larger memory bandwidth (102.4GB/s vs 89.6GB/s)

Newer PCIe version (5 vs 4)

Larger L3 cache size (24MB vs 16MB)

More modern manufacturing process (3nm vs 4nm)

AMD Ryzen 5 PRO 8645HS 's Advantages

Higher specification of memory (7500 vs 6400)

Higher base frequency (4.3GHz vs 2.4GHz)

Lower TDP (54W vs 55W)

Score

Intel Core Ultra 7 255HX

VS

AMD Ryzen 5 PRO 8645HS

General Parameters

Jan 2025

Release Date

Apr 2024

Intel

Manufacturer

AMD

Laptop

Type

Laptop

Arrow Lake

Core Architecture

Hawk Point

Intel Socket 1851

Socket

AMD Socket FP7

Arc Xe-LPG

Integrated Graphics

Radeon 760M

Ultra 7 (Arrow Lake)

Generation

Ryzen 5 (Zen 4 (Hawk Point))

Package

-

Transistor Count

25 billions

3 nm

Manufacturing Process

4 nm

17-55 W

Power Consumption

35-54 W

100 °C

Peak Operating Temperature

-

Intel

Foundry

TSMC

-

Die Size

178 mm²

CPU Performance

8

Performance Cores

6

8

Performance Core Threads

12

2.4 GHz

Performance Core Base Frequency

4.3 GHz

5.2 GHz

Performance Core Turbo Frequency

5 GHz

12

Efficiency Cores

-

12

Efficiency Core Threads

-

1.8 GHz

Efficiency Core Base Frequency

-

4.5 GHz

Efficiency Core Turbo Frequency

-

20

Total Core Count

6

20

Total Thread Count

12

100 MHz

Bus Frequency

100 MHz

24

Multiplier

43.0

112 KB per core

L1 Cache

64 KB per core

23 MB

L2 Cache

6 MB

24 MB shared

L3 Cache

16 MB

No

Unlocked Multiplier

No

1

SMP

1

Memory Parameters

DDR5-6400

Memory Types

DDR5-5600,LPDDR5x-7500

256 GB

Max Memory Size

256 GB

2

Max Memory Channels

2

102.4 GB/s

Max Memory Bandwidth

89.6 GB/s

Yes

ECC Memory Support

Yes

Graphics Card Parameters

true

Integrated Graphics

true

1900 MHz

GPU Max Dynamic Frequency

2600 MHz

64

Execution Units

8

AI Accelerator

-

NPU

AMD Ryzen™ AI

-

Theoretical performance

16 TOPS

Miscellaneous

Official Website

AMD Ryzen 5 PRO 8645HS

5

PCIe Version

4

PCIe Lanes

20

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