AMD Ryzen 9 7945HX vs AMD Ryzen 7 7840U

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We compared two laptop CPUs: AMD Ryzen 9 7945HX with 16 cores 2.5GHz and AMD Ryzen 7 7840U with 8 cores 3.3GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

AMD Ryzen 9 7945HX 's Advantages

Newer PCIe version (5.0 vs 4.0)

Larger L3 cache size (64MB vs 16MB)

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 2.5GHz)

Lower TDP (15W vs 55W)

Score

Benchmark

Cinebench R23 Single Core

AMD Ryzen 9 7945HX +10%

1963

AMD Ryzen 7 7840U

1771

Cinebench R23 Multi Core

AMD Ryzen 9 7945HX +166%

34581

AMD Ryzen 7 7840U

12992

Geekbench 6 Single Core

AMD Ryzen 9 7945HX +21%

2906

AMD Ryzen 7 7840U

2401

Geekbench 6 Multi Core

AMD Ryzen 9 7945HX +76%

19413

AMD Ryzen 7 7840U

10983

Blender

AMD Ryzen 9 7945HX +115%

505

AMD Ryzen 7 7840U

234

Geekbench 5 Single Core

AMD Ryzen 9 7945HX +9%

2095

AMD Ryzen 7 7840U

1907

Geekbench 5 Multi Core

AMD Ryzen 9 7945HX +87%

19488

AMD Ryzen 7 7840U

10387

AMD Ryzen 9 7945HX

VS

AMD Ryzen 7 7840U

General Parameters

Jan 2023

Release Date

May 2023

Amd

Manufacturer

AMD

Laptop

Type

Laptop

x86-64

Instruction Set

x86-64

Zen 4 (Dragon Range)

Core Architecture

Zen 4 (Phoenix)

FL1

Socket

FP8

Radeon 610M

Integrated Graphics

Radeon 780M

Package

13.1 billions

Transistor Count

25 billions

5 nm

Manufacturing Process

4 nm

FL1

Socket

FP8

55-75 W

Power Consumption

15-30 W

100°C

Peak Operating Temperature

100°C

CPU Performance

16

Performance Cores

8

32

Performance Core Threads

16

2.5 GHz

Performance Core Base Frequency

3.3 GHz

5.4 GHz

Performance Core Turbo Frequency

5.1 GHz

16

Total Core Count

8

32

Total Thread Count

16

100 MHz

Bus Frequency

100 MHz

25x

Multiplier

33x

64 K per core

L1 Cache

64 K per core

1 MB per core

L2 Cache

1 MB per core

64 MB shared

L3 Cache

16 MB shared

Yes

Unlocked Multiplier

No

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

-

No

ECC Memory Support

Yes

Graphics Card Parameters

true

Integrated Graphics

true

1500 MHz

GPU Base Frequency

1500 MHz

2200 MHz

GPU Max Dynamic Frequency

2700 MHz

128

Shader Units

768

8

Texture Units

48

4

Raster Operation Units

32

2

Execution Units

12

15 W

Power Consumption

15 W

-

Max Resolution

7680x4320 - 60 Hz

0.49 TFLOPS

Graphics Performance

8.12 TFLOPS

Miscellaneous

AMD Ryzen 9 7945HX

Official Website

AMD Ryzen 7 7840U

5.0

PCIe Version

4.0

28

PCIe Lanes

20

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