AMD Ryzen 5 7645HX vs AMD Ryzen 9 5900H

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We compared two laptop CPUs: AMD Ryzen 5 7645HX with 6 cores 4.0GHz and AMD Ryzen 9 5900H 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 5 7645HX 's Advantages

Released 1 years and 9 months late

Larger memory bandwidth (83.2GB/s vs 68.27GB/s)

Newer PCIe version (5.0 vs 3.0)

Higher base frequency (4.0GHz vs 3.3GHz)

Larger L3 cache size (32MB vs 16MB)

More modern manufacturing process (5nm vs 7nm)

Lower TDP (45W vs 45W)

AMD Ryzen 9 5900H 's Advantages

Higher specification of memory (LPDDR4-4266 vs DDR5-5200)

Score

Benchmark

Cinebench R23 Single Core

AMD Ryzen 5 7645HX +24%

1827

AMD Ryzen 9 5900H

1466

Cinebench R23 Multi Core

AMD Ryzen 5 7645HX +10%

14098

AMD Ryzen 9 5900H

12815

Geekbench 6 Single Core

AMD Ryzen 5 7645HX +33%

2720

AMD Ryzen 9 5900H

2034

Geekbench 6 Multi Core

AMD Ryzen 5 7645HX +61%

11906

AMD Ryzen 9 5900H

7376

Geekbench 5 Single Core

AMD Ryzen 5 7645HX +24%

1895

AMD Ryzen 9 5900H

1528

Geekbench 5 Multi Core

AMD Ryzen 5 7645HX +26%

11141

AMD Ryzen 9 5900H

8790

AMD Ryzen 5 7645HX

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AMD Ryzen 9 5900H

General Parameters

Jan 2023

Release Date

Apr 2021

AMD

Manufacturer

AMD

Laptop

Type

Laptop

x86-64

Instruction Set

x86-64

Zen 4 (Dragon Range)

Core Architecture

Cezanne

FL1

Socket

FP6

Radeon 610M

Integrated Graphics

Radeon RX Vega 8

Package

5 nm

Manufacturing Process

7 nm

FL1

Socket

FP6

45-75 W

Power Consumption

45 W

100°C

Peak Operating Temperature

105 °C

CPU Performance

6

Performance Cores

8

12

Performance Core Threads

16

4.0 GHz

Performance Core Base Frequency

3.3 GHz

5 GHz

Performance Core Turbo Frequency

4.6 GHz

6

Total Core Count

8

12

Total Thread Count

16

100 MHz

Bus Frequency

100 MHz

40x

Multiplier

33x

64 K per core

L1 Cache

64 K per core

1 MB per core

L2 Cache

512 K per core

32 MB shared

L3 Cache

16 MB shared

Yes

Unlocked Multiplier

No

Memory Parameters

DDR5-5200

Memory Types

DDR4-3200, LPDDR4-4266

64 GB

Max Memory Size

64 GB

2

Max Memory Channels

2

83.2 GB/s

Max Memory Bandwidth

68.27 GB/s

No

ECC Memory Support

Yes

Graphics Card Parameters

true

Integrated Graphics

true

1500 MHz

GPU Base Frequency

-

2200 MHz

GPU Max Dynamic Frequency

1750 MHz

128

Shader Units

512

8

Texture Units

32

4

Raster Operation Units

8

2

Execution Units

-

15 W

Power Consumption

15 W

0.49 TFLOPS

Graphics Performance

-

Miscellaneous

AMD Ryzen 5 7645HX

Official Website

-

5.0

PCIe Version

3.0

28

PCIe Lanes

16

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