AMD EPYC 9645 vs AMD EPYC 7251

VS

AMD EPYC 9645

AMD EPYC 7251

We compared two server CPUs: AMD EPYC 9645 with 96 cores 2.3GHz and AMD EPYC 7251 with 8 cores 2.1GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

AMD EPYC 9645 's Advantages

Released 7 years and 4 months late

Higher specification of memory (6000 vs 2400)

Newer PCIe version (5 vs 3)

Higher base frequency (2.3GHz vs 2.1GHz)

Larger L3 cache size (256MB vs 32MB)

More modern manufacturing process (3nm vs 14nm)

AMD EPYC 7251 's Advantages

Lower TDP (120W vs 320W)

Score

AMD EPYC 9645

VS

AMD EPYC 7251

General Parameters

Oct 2024

Release Date

Jun 2017

AMD

Manufacturer

AMD

Server

Type

Server

Turin

Core Architecture

Naples

AMD Socket SP5

Socket

AMD Socket SP3

N/A

Integrated Graphics

N/A

EPYC(Zen 5c (Turin))

Generation

EPYC (Zen (Naples))

Package

Transistor Count

4.8 billions

3 nm

Manufacturing Process

14 nm

320 W

Power Consumption

120 W

-

Peak Operating Temperature

81 °C

TSMC

Foundry

GlobalFoundries

mm²

Die Size

213 mm²

6 nm

I/O Process Size

-

mm²

I/O Die Size

-

CPU Performance

96

Performance Cores

-

192

Performance Core Threads

-

2.3 GHz

Performance Core Base Frequency

2.1 GHz

3.7 GHz

Performance Core Turbo Frequency

2.9 GHz

96

Total Core Count

8

192

Total Thread Count

16

100 MHz

Bus Frequency

100 MHz

23.0

Multiplier

21.0

80 KB per core

L1 Cache

96 K per core

1 MB per core

L2 Cache

512 K per core

256 MB shared

L3 Cache

32 MB shared

No

Unlocked Multiplier

Yes

2

SMP

2

Memory Parameters

DDR5-6000

Memory Types

DDR4-2400

6 TB

Max Memory Size

-

12

Max Memory Channels

8

576 GB/s

Max Memory Bandwidth

-

Yes

ECC Memory Support

Yes

Miscellaneous

AMD EPYC 9645

Official Website

-

5

PCIe Version

3

128

PCIe Lanes

-

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