AMD EPYC 7643 vs Intel Xeon E3 1275

VS

AMD EPYC 7643

Intel Xeon E3-1275

We compared two server CPUs: AMD EPYC 7643 with 48 cores 2.3GHz and Intel Xeon E3 1275 with 4 cores 3.4GHz . 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 9 years and 11 months late

Higher specification of memory (3200 vs 3)

Newer PCIe version (4 vs 3)

Larger L3 cache size (256MB vs 8MB)

More modern manufacturing process (7nm vs 32nm)

Intel Xeon E3 1275 's Advantages

Higher base frequency (3.4GHz vs 2.3GHz)

Lower TDP (95W vs 225W)

Score

Benchmark

Geekbench 6 Single Core

AMD EPYC 7643 +25%

1696

Intel Xeon E3 1275

1347

Geekbench 6 Multi Core

AMD EPYC 7643 +119%

9939

Intel Xeon E3 1275

4527

AMD EPYC 7643

VS

Intel Xeon E3 1275

General Parameters

Mar 2021

Release Date

Apr 2011

AMD

Manufacturer

Intel

Server

Type

Server

Milan

Core Architecture

Sandy Bridge

AMD Socket SP3

Socket

Intel Socket 1155

N/A

Integrated Graphics

Intel HD P3000

EPYC (Zen 3 (Milan))

Generation

Xeon E3 (Sandy Bridge)

Package

33.2 billions

Transistor Count

1.16 billions

7 nm

Manufacturing Process

32 nm

225 W

Power Consumption

95 W

TSMC

Foundry

Intel

8x81 mm²

Die Size

216 mm²

12 nm

I/O Process Size

-

416 mm²

I/O Die Size

-

CPU Performance

2.3 GHz

Performance Core Base Frequency

3.4 GHz

3.6 GHz

Performance Core Turbo Frequency

3.8 GHz

48

Total Core Count

4

96

Total Thread Count

8

100 MHz

Bus Frequency

100 MHz

23.0

Multiplier

34.0

64 KB per core

L1 Cache

64 K per core

512 KB per core

L2 Cache

256 K per core

256 MB shared

L3 Cache

8 MB shared

No

Unlocked Multiplier

No

6

Cores per CCD

-

2

SMP

1

Memory Parameters

DDR4-3200

Memory Types

DDR3

8

Max Memory Channels

2

Yes

ECC Memory Support

Yes

Miscellaneous

4

PCIe Version

3

128

PCIe Lanes

16

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