AMD EPYC 7663 vs AMD EPYC 9255

VS

AMD EPYC 7663

AMD EPYC 9255

We compared two server CPUs: AMD EPYC 7663 with 56 cores 2GHz 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 7663 's Advantages

Larger L3 cache size (256MB vs 128MB)

AMD EPYC 9255 's Advantages

Released 3 years and 7 months late

Higher specification of memory (6000 vs 3200)

Newer PCIe version (5 vs 4)

Higher base frequency (3.25GHz vs 2GHz)

More modern manufacturing process (4nm vs 7nm)

Lower TDP (200W vs 240W)

Score

AMD EPYC 7663

VS

AMD EPYC 9255

General Parameters

Mar 2021

Release Date

Oct 2024

AMD

Manufacturer

AMD

Server

Type

Server

Milan

Core Architecture

Turin

AMD Socket SP3

Socket

AMD Socket SP5

N/A

Integrated Graphics

N/A

EPYC (Zen 3 (Milan))

Generation

EPYC(Zen 5 (Turin))

Package

33.2 billions

Transistor Count

33.26 billions

7 nm

Manufacturing Process

4 nm

240 W

Power Consumption

200 W

TSMC

Foundry

TSMC

8x81 mm²

Die Size

4x70.6 mm²

12 nm

I/O Process Size

6 nm

416 mm²

I/O Die Size

mm²

CPU Performance

-

Performance Cores

24

-

Performance Core Threads

48

2 GHz

Performance Core Base Frequency

3.25 GHz

3.5 GHz

Performance Core Turbo Frequency

4.8 GHz

56

Total Core Count

24

112

Total Thread Count

48

100 MHz

Bus Frequency

100 MHz

20.0

Multiplier

32.5

64 KB per core

L1 Cache

80 KB per core

512 KB per core

L2 Cache

1 MB per core

256 MB shared

L3 Cache

128 MB shared

No

Unlocked Multiplier

No

7

Cores per CCD

-

2

SMP

2

Memory Parameters

DDR4-3200

Memory Types

DDR5-6000

-

Max Memory Size

6 TB

8

Max Memory Channels

12

-

Max Memory Bandwidth

576 GB/s

Yes

ECC Memory Support

Yes

Miscellaneous

-

Official Website

AMD EPYC 9255

4

PCIe Version

5

128

PCIe Lanes

128

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