AMD EPYC 7643 vs Opteron 6276

VS

AMD EPYC 7643

AMD Opteron 6276

We compared two server CPUs: AMD EPYC 7643 with 48 cores 2.3GHz and Opteron 6276 with 16 cores 2.3GHz . 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 4 months late

Higher specification of memory (3200 vs 3)

Newer PCIe version (4 vs 2)

Larger L3 cache size (256MB vs 8MB)

More modern manufacturing process (7nm vs 32nm)

Opteron 6276 's Advantages

Lower TDP (115W vs 225W)

Score

Benchmark

Geekbench 6 Single Core

AMD EPYC 7643 +756%

1696

Opteron 6276

198

Geekbench 6 Multi Core

AMD EPYC 7643 +474%

9939

Opteron 6276

1729

AMD EPYC 7643

VS

Opteron 6276

General Parameters

Mar 2021

Release Date

Nov 2011

AMD

Manufacturer

AMD

Server

Type

Server

Milan

Core Architecture

Interlagos

AMD Socket SP3

Socket

AMD Socket G34

N/A

Integrated Graphics

N/A

EPYC (Zen 3 (Milan))

Generation

Opteron (Interlagos)

Package

33.2 billions

Transistor Count

2.4 billions

7 nm

Manufacturing Process

32 nm

225 W

Power Consumption

115 W

TSMC

Foundry

-

8x81 mm²

Die Size

316 mm²

12 nm

I/O Process Size

-

416 mm²

I/O Die Size

-

CPU Performance

2.3 GHz

Performance Core Base Frequency

2.3 GHz

3.6 GHz

Performance Core Turbo Frequency

3.2 GHz

48

Total Core Count

16

96

Total Thread Count

16

100 MHz

Bus Frequency

200 MHz

23.0

Multiplier

11.5

64 KB per core

L1 Cache

768 K

512 KB per core

L2 Cache

16 MB

256 MB shared

L3 Cache

8 MB per die

No

Unlocked Multiplier

No

6

Cores per CCD

-

2

SMP

4

Memory Parameters

DDR4-3200

Memory Types

DDR3

8

Max Memory Channels

Yes

ECC Memory Support

No

Miscellaneous

4

PCIe Version

2

128

PCIe Lanes

-

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