AMD Ryzen 9 7940HX vs AMD Ryzen 5 8640U

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We compared two laptop CPUs: AMD Ryzen 9 7940HX with 16 cores 2.4GHz and AMD Ryzen 5 8640U with 6 cores 3.5GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

AMD Ryzen 9 7940HX 's Advantages

Newer PCIe version (5.0 vs 4.0)

Larger L3 cache size (64MB vs 16MB)

AMD Ryzen 5 8640U 's Advantages

Better graphics card performance

Higher specification of memory (LPDDR5x-7500 vs DDR5-5200)

Larger memory bandwidth (89.6GB/s vs 83.2GB/s)

Higher base frequency (3.5GHz vs 2.4GHz)

Lower TDP (15W vs 55W)

Score

Benchmark

Cinebench R23 Single Core

AMD Ryzen 9 7940HX +3%

1882

AMD Ryzen 5 8640U

1819

Cinebench R23 Multi Core

AMD Ryzen 9 7940HX +180%

33284

AMD Ryzen 5 8640U

11872

Geekbench 6 Single Core

AMD Ryzen 9 7940HX +11%

2688

AMD Ryzen 5 8640U

2419

Geekbench 6 Multi Core

AMD Ryzen 9 7940HX +51%

15655

AMD Ryzen 5 8640U

10350

AMD Ryzen 9 7940HX

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AMD Ryzen 5 8640U

General Parameters

Jan 2024

Release Date

Dec 2023

AMD

Manufacturer

Amd

Laptop

Type

Laptop

x86-64

Instruction Set

x86-64

Zen 4 (Dragon Range)

Core Architecture

Hawk Point

AMD Socket FL1

Socket

FP7

Radeon 610M

Integrated Graphics

Radeon 760M

-

Generation

Ryzen 5 (Zen 4 (Hawk Point))

Package

13.14 billions

Transistor Count

25 billions

5 nm

Manufacturing Process

4 nm

AMD Socket FL1

Socket

FP7

55 W

Power Consumption

15-30 W

100°C

Peak Operating Temperature

100°C

-

Foundry

TSMC

-

Die Size

178 mm²

-

Package

FP8, FP7, FP7r2

CPU Performance

16

Performance Cores

6

32

Performance Core Threads

12

2.4 GHz

Performance Core Base Frequency

3.5 GHz

5.2 GHz

Performance Core Turbo Frequency

4.9 GHz

16

Total Core Count

6

32

Total Thread Count

12

100 MHz

Bus Frequency

100 MHz

24

Multiplier

35x

64 K per core

L1 Cache

64 K per core

1 MB per core

L2 Cache

1 MB per core

64 MB

L3 Cache

16 MB shared

Yes

Unlocked Multiplier

No

-

SMP

1

Memory Parameters

DDR5-5200

Memory Types

DDR5-5600, LPDDR5x-7500

64 GB

Max Memory Size

256 GB

2

Max Memory Channels

2

83.2 GB/s

Max Memory Bandwidth

89.6 GB/s

-

ECC Memory Support

No

Graphics Card Parameters

true

Integrated Graphics

true

400 MHz

GPU Base Frequency

1500 MHz

2200 MHz

GPU Max Dynamic Frequency

2600 MHz

128

Shader Units

384

8

Texture Units

24

4

Raster Operation Units

16

2

Execution Units

6

15 W

Power Consumption

15 W

0.563 TFLOPS

Graphics Performance

4.06 TFLOPS

Miscellaneous

Official Website

AMD Ryzen 5 8640U

5.0

PCIe Version

4.0

28

PCIe Lanes

20

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