AMD Ryzen 7 7840U vs AMD Ryzen 9 7940HX

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We compared two laptop CPUs: AMD Ryzen 7 7840U with 8 cores 3.3GHz and AMD Ryzen 9 7940HX with 16 cores 2.4GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

AMD Ryzen 7 7840U 's Advantages

Better graphics card performance

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

Higher base frequency (3.3GHz vs 2.4GHz)

More modern manufacturing process (4nm vs 5nm)

Lower TDP (15W vs 55W)

AMD Ryzen 9 7940HX 's Advantages

Released 8 months late

Newer PCIe version (5.0 vs 4.0)

Larger L3 cache size (64MB vs 16MB)

Score

Benchmark

Cinebench R23 Single Core

AMD Ryzen 7 7840U

1771

AMD Ryzen 9 7940HX +6%

1882

Cinebench R23 Multi Core

AMD Ryzen 7 7840U

12992

AMD Ryzen 9 7940HX +156%

33284

Geekbench 6 Single Core

AMD Ryzen 7 7840U

2401

AMD Ryzen 9 7940HX +11%

2688

Geekbench 6 Multi Core

AMD Ryzen 7 7840U

10983

AMD Ryzen 9 7940HX +42%

15655

AMD Ryzen 7 7840U

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AMD Ryzen 9 7940HX

General Parameters

May 2023

Release Date

Jan 2024

AMD

Manufacturer

AMD

Laptop

Type

Laptop

x86-64

Instruction Set

x86-64

Zen 4 (Phoenix)

Core Architecture

Zen 4 (Dragon Range)

FP8

Socket

AMD Socket FL1

Radeon 780M

Integrated Graphics

Radeon 610M

Package

25 billions

Transistor Count

13.14 billions

4 nm

Manufacturing Process

5 nm

FP8

Socket

AMD Socket FL1

15-30 W

Power Consumption

55 W

100°C

Peak Operating Temperature

100°C

CPU Performance

8

Performance Cores

16

Performance Core Threads

32

3.3 GHz

Performance Core Base Frequency

2.4 GHz

5.1 GHz

Performance Core Turbo Frequency

5.2 GHz

8

Total Core Count

16

Total Thread Count

32

100 MHz

Bus Frequency

100 MHz

33x

Multiplier

24

64 K per core

L1 Cache

64 K per core

1 MB per core

L2 Cache

1 MB per core

16 MB shared

L3 Cache

64 MB

No

Unlocked Multiplier

Yes

Memory Parameters

DDR5-5600, LPDDR5x-7500

Memory Types

DDR5-5200

256 GB

Max Memory Size

64 GB

2

Max Memory Channels

2

-

Max Memory Bandwidth

83.2 GB/s

Yes

ECC Memory Support

-

Graphics Card Parameters

true

Integrated Graphics

true

1500 MHz

GPU Base Frequency

400 MHz

2700 MHz

GPU Max Dynamic Frequency

2200 MHz

768

Shader Units

128

48

Texture Units

8

32

Raster Operation Units

4

12

Execution Units

2

15 W

Power Consumption

15 W

7680x4320 - 60 Hz

Max Resolution

-

8.12 TFLOPS

Graphics Performance

0.563 TFLOPS

Miscellaneous

AMD Ryzen 7 7840U

Official Website

4.0

PCIe Version

5.0

20

PCIe Lanes

28

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