Intel Xeon E5645 vs Intel Xeon E5 2643

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Intel Xeon E5645

Intel Xeon E5-2643

We compared two server CPUs: Intel Xeon E5645 with 6 cores 2.4GHz and Intel Xeon E5 2643 with 4 cores 3.3GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Xeon E5645 's Advantages

Larger L3 cache size (12MB vs 10MB)

Lower TDP (80W vs 130W)

Intel Xeon E5 2643 's Advantages

Released 2 years late

Newer PCIe version (3 vs 2)

Higher base frequency (3.3GHz vs 2.4GHz)

Score

Benchmark

Geekbench 6 Single Core

Intel Xeon E5645

425

Intel Xeon E5 2643 +168%

1143

Geekbench 6 Multi Core

Intel Xeon E5645

3117

Intel Xeon E5 2643 +55%

4836

Intel Xeon E5645

VS

Intel Xeon E5 2643

General Parameters

Mar 2010

Release Date

Mar 2012

Intel

Manufacturer

Intel

Server

Type

Server

Westmere-EP

Core Architecture

Sandy Bridge-EP

Intel Socket 1366

Socket

Intel Socket 2011

N/A

Integrated Graphics

N/A

Xeon (Westmere-EP)

Generation

Xeon E5 (Sandy Bridge-EP)

Package

1.17 billions

Transistor Count

1.27 billions

32 nm

Manufacturing Process

32 nm

80 W

Power Consumption

130 W

Intel

Foundry

Intel

239 mm²

Die Size

294 mm²

CPU Performance

2.4 GHz

Performance Core Base Frequency

3.3 GHz

2.666 GHz

Performance Core Turbo Frequency

3.5 GHz

6

Total Core Count

4

12

Total Thread Count

8

133 MHz

Bus Frequency

100 MHz

18.0

Multiplier

33.0

64 K per core

L1 Cache

64 K per core

256 K per core

L2 Cache

256 K per core

12 MB shared

L3 Cache

10 MB shared

No

Unlocked Multiplier

No

2

SMP

2

Memory Parameters

DDR3

Memory Types

DDR3

3

Max Memory Channels

4

Yes

ECC Memory Support

Yes

Miscellaneous

2

PCIe Version

3

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