AMD EPYC 7643 vs Xeon L5645

VS

AMD EPYC 7643

Intel Xeon L5645

We compared two server CPUs: AMD EPYC 7643 with 48 cores 2.3GHz and Xeon L5645 with 6 cores 2.4GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

AMD EPYC 7643 's Advantages

Released 10 years and 1 months late

Higher specification of memory (3200 vs 1333)

Newer PCIe version (4 vs 2)

Larger L3 cache size (256MB vs 12MB)

More modern manufacturing process (7nm vs 32nm)

Xeon L5645 's Advantages

Higher base frequency (2.4GHz vs 2.3GHz)

Lower TDP (60W vs 225W)

Score

AMD EPYC 7643

VS

Xeon L5645

General Parameters

Mar 2021

Release Date

Feb 2011

AMD

Manufacturer

Intel

Server

Type

Server

Milan

Core Architecture

Westmere-EP

AMD Socket SP3

Socket

Intel Socket 1366

N/A

Integrated Graphics

N/A

EPYC (Zen 3 (Milan))

Generation

Xeon(Westmere-EP)

Package

33.2 billions

Transistor Count

1.17 billions

7 nm

Manufacturing Process

32 nm

225 W

Power Consumption

60 W

TSMC

Foundry

Intel

8x81 mm²

Die Size

239 mm²

12 nm

I/O Process Size

-

416 mm²

I/O Die Size

-

CPU Performance

2.3 GHz

Performance Core Base Frequency

2.4 GHz

3.6 GHz

Performance Core Turbo Frequency

2.933 GHz

48

Total Core Count

6

96

Total Thread Count

12

100 MHz

Bus Frequency

133 MHz

23.0

Multiplier

18.0

64 KB per core

L1 Cache

64 KB per core

512 KB per core

L2 Cache

256 KB per core

256 MB shared

L3 Cache

12 MB shared

No

Unlocked Multiplier

No

6

Cores per CCD

-

2

SMP

2

Memory Parameters

DDR4-3200

Memory Types

DDR3-1333

8

Max Memory Channels

3

Yes

ECC Memory Support

Yes

Miscellaneous

4

PCIe Version

2

128

PCIe Lanes

-

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