AMD Ryzen 7 7840U vs AMD Ryzen 5 7645HX

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We compared two laptop CPUs: AMD Ryzen 7 7840U with 8 cores 3.3GHz and AMD Ryzen 5 7645HX with 6 cores 4.0GHz . 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)

More modern manufacturing process (4nm vs 5nm)

Lower TDP (15W vs 45W)

AMD Ryzen 5 7645HX's Advantages

Newer PCIe version (5.0 vs 4.0)

Higher base frequency (4.0GHz vs 3.3GHz)

Larger L3 cache size (32MB vs 16MB)

Score

Benchmark

Cinebench R23 Single Core

AMD Ryzen 7 7840U

1742

AMD Ryzen 5 7645HX +3%

1808

Cinebench R23 Multi Core

AMD Ryzen 7 7840U

12833

AMD Ryzen 5 7645HX +7%

13836

Geekbench 6 Single Core

AMD Ryzen 7 7840U

2401

AMD Ryzen 5 7645HX +13%

2720

Geekbench 6 Multi Core

AMD Ryzen 7 7840U

10983

AMD Ryzen 5 7645HX +8%

11906

Geekbench 5 Single Core

AMD Ryzen 7 7840U

1907

AMD Ryzen 5 7645HX

1895

Geekbench 5 Multi Core

AMD Ryzen 7 7840U

10387

AMD Ryzen 5 7645HX +7%

11141

AMD Ryzen 7 7840U

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AMD Ryzen 5 7645HX

General Parameters

May 2023

Release Date

Jan 2023

AMD

Manufacturer

AMD

Laptop

Type

Laptop

x86-64

Instruction Set

x86-64

Zen 4 (Phoenix)

Core Architecture

Zen 4 (Dragon Range)

FP8

Socket

FL1

Radeon 780M

Integrated Graphics

Radeon 610M

Package

25 billions

Transistor Count

-

4 nm

Manufacturing Process

5 nm

FP8

Socket

FL1

15-30 W

Power Consumption

45-75 W

100°C

Peak Operating Temperature

100°C

CPU Performance

8

Performance Cores

6

16

Performance Core Threads

12

3.3 GHz

Performance Core Base Frequency

4.0 GHz

5.1 GHz

Performance Core Turbo Frequency

5 GHz

8

Total Core Count

6

16

Total Thread Count

12

100MHz

Bus Frequency

100MHz

33x

Multiplier

40x

64K per core

L1 Cache

64K per core

1MB per core

L2 Cache

1MB per core

16MB shared

L3 Cache

32MB shared

No

Unlocked Multiplier

Yes

Memory Parameters

DDR5-5600, LPDDR5x-7500

Memory Types

DDR5-5200

256GB

Max Memory Size

64GB

2

Max Memory Channels

2

-

Max Memory Bandwidth

83.2 GB/s

Yes

ECC Memory Support

No

Graphics Card Parameters

True

Integrated Graphics

True

1500 MHz

GPU Base Frequency

1500 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

0.49 TFLOPS

Miscellaneous

AMD Ryzen 7 7840U

Official Website

AMD Ryzen 5 7645HX

4.0

PCIe Version

5.0

20

PCIe Lanes

28

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