AMD EPYC 9645 vs AMD EPYC 9255

VS

AMD EPYC 9645

AMD EPYC 9255

We compared two server CPUs: AMD EPYC 9645 with 96 cores 2.3GHz and AMD EPYC 9255 with 24 cores 3.25GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

AMD EPYC 9645 's Advantages

Larger L3 cache size (256MB vs 128MB)

More modern manufacturing process (3nm vs 4nm)

AMD EPYC 9255 's Advantages

Higher base frequency (3.25GHz vs 2.3GHz)

Lower TDP (200W vs 320W)

Score

AMD EPYC 9645

VS

AMD EPYC 9255

General Parameters

Oct 2024

Release Date

Oct 2024

AMD

Manufacturer

AMD

Server

Type

Server

Turin

Core Architecture

Turin

AMD Socket SP5

Socket

AMD Socket SP5

N/A

Integrated Graphics

N/A

EPYC(Zen 5c (Turin))

Generation

EPYC(Zen 5 (Turin))

Package

Transistor Count

33.26 billions

3 nm

Manufacturing Process

4 nm

320 W

Power Consumption

200 W

TSMC

Foundry

TSMC

mm²

Die Size

4x70.6 mm²

6 nm

I/O Process Size

6 nm

mm²

I/O Die Size

mm²

CPU Performance

96

Performance Cores

24

192

Performance Core Threads

48

2.3 GHz

Performance Core Base Frequency

3.25 GHz

3.7 GHz

Performance Core Turbo Frequency

4.8 GHz

96

Total Core Count

24

192

Total Thread Count

48

100 MHz

Bus Frequency

100 MHz

23.0

Multiplier

32.5

80 KB per core

L1 Cache

80 KB per core

1 MB per core

L2 Cache

1 MB per core

256 MB shared

L3 Cache

128 MB shared

No

Unlocked Multiplier

No

2

SMP

2

Memory Parameters

DDR5-6000

Memory Types

DDR5-6000

6 TB

Max Memory Size

6 TB

12

Max Memory Channels

12

576 GB/s

Max Memory Bandwidth

576 GB/s

Yes

ECC Memory Support

Yes

Miscellaneous

AMD EPYC 9645

Official Website

AMD EPYC 9255

5

PCIe Version

5

128

PCIe Lanes

128

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