AMD Ryzen 7 7840U vs AMD Ryzen 9 7945HX3D

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We compared two laptop CPUs: AMD Ryzen 7 7840U with 8 cores 3.3GHz and AMD Ryzen 9 7945HX3D with 16 cores 2.3GHz . 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 2.3GHz)

More modern manufacturing process (4nm vs 5nm)

Lower TDP (15W vs 55W)

AMD Ryzen 9 7945HX3D 's Advantages

Newer PCIe version (5 vs 4.0)

Larger L3 cache size (128MB vs 16MB)

Score

Benchmark

Cinebench R23 Single Core

AMD Ryzen 7 7840U

1771

AMD Ryzen 9 7945HX3D +10%

1958

Cinebench R23 Multi Core

AMD Ryzen 7 7840U

12992

AMD Ryzen 9 7945HX3D +159%

33745

Geekbench 6 Single Core

AMD Ryzen 7 7840U

2401

AMD Ryzen 9 7945HX3D +15%

2783

Geekbench 6 Multi Core

AMD Ryzen 7 7840U

10983

AMD Ryzen 9 7945HX3D +46%

16080

Blender

AMD Ryzen 7 7840U

234

AMD Ryzen 9 7945HX3D +107%

485

Geekbench 5 Single Core

AMD Ryzen 7 7840U

1907

AMD Ryzen 9 7945HX3D +12%

2138

Geekbench 5 Multi Core

AMD Ryzen 7 7840U

10387

AMD Ryzen 9 7945HX3D +84%

19153

AMD Ryzen 7 7840U

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AMD Ryzen 9 7945HX3D

General Parameters

May 2023

Release Date

Jul 2023

AMD

Manufacturer

AMD

Laptop

Type

Laptop

x86-64

Instruction Set

-

Zen 4 (Phoenix)

Core Architecture

Dragon Range

FP8

Socket

AMD Socket FL1

Radeon 780M

Integrated Graphics

Radeon 610M

-

Generation

Ryzen 9 (Zen 4 (Dragon Range))

Package

25 billions

Transistor Count

17.84 billions

4 nm

Manufacturing Process

5 nm

FP8

Socket

AMD Socket FL1

15-30 W

Power Consumption

55 W

100°C

Peak Operating Temperature

89 °C

-

Foundry

TSMC

-

Die Size

2x71 mm²

-

I/O Process Size

6 nm

-

I/O Die Size

122 mm²

-

Package

µFC-BGAFL1

CPU Performance

8

Performance Cores

-

16

Performance Core Threads

-

3.3 GHz

Performance Core Base Frequency

2.3 GHz

5.1 GHz

Performance Core Turbo Frequency

5.4 GHz

8

Total Core Count

16

Total Thread Count

32

100 MHz

Bus Frequency

100 MHz

33x

Multiplier

23.0

64 K per core

L1 Cache

64 KB per core

1 MB per core

L2 Cache

1 MB per core

16 MB shared

L3 Cache

128 MB shared

No

Unlocked Multiplier

Yes

-

SMP

1

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

Yes

Graphics Card Parameters

true

Integrated Graphics

true

1500 MHz

GPU Base Frequency

-

2700 MHz

GPU Max Dynamic Frequency

2200 MHz

768

Shader Units

-

48

Texture Units

-

32

Raster Operation Units

-

12

Execution Units

2

15 W

Power Consumption

-

7680x4320 - 60 Hz

Max Resolution

-

8.12 TFLOPS

Graphics Performance

0.49 TFLOPS

Miscellaneous

AMD Ryzen 7 7840U

Official Website

AMD Ryzen 9 7945HX3D

4.0

PCIe Version

5

20

PCIe Lanes

28

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