Intel Xeon E5645 vs Intel Xeon E3 1275 v3

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Intel Xeon E5645

Intel Xeon E3-1275 v3

We compared two server CPUs: Intel Xeon E5645 with 6 cores 2.4GHz and Intel Xeon E3 1275 v3 with 4 cores 3.5GHz . 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 8MB)

Lower TDP (80W vs 84W)

Intel Xeon E3 1275 v3 's Advantages

Released 3 years and 3 months late

Higher specification of memory (4 vs 3)

Newer PCIe version (3 vs 2)

Higher base frequency (3.5GHz vs 2.4GHz)

More modern manufacturing process (22nm vs 32nm)

Score

Benchmark

Geekbench 6 Single Core

Intel Xeon E5645

425

Intel Xeon E3 1275 v3 +168%

1140

Geekbench 6 Multi Core

Intel Xeon E5645 +1%

3117

Intel Xeon E3 1275 v3

3063

Intel Xeon E5645

VS

Intel Xeon E3 1275 v3

General Parameters

Mar 2010

Release Date

Jun 2013

Intel

Manufacturer

Intel

Server

Type

Server

Westmere-EP

Core Architecture

Haswell-WS

Intel Socket 1366

Socket

Intel Socket 1150

N/A

Integrated Graphics

Intel HD P4600

Xeon (Westmere-EP)

Generation

Xeon E3 (Haswell-WS)

Package

1.17 billions

Transistor Count

1.4 billions

32 nm

Manufacturing Process

22 nm

80 W

Power Consumption

84 W

Intel

Foundry

Intel

239 mm²

Die Size

160 mm²

CPU Performance

2.4 GHz

Performance Core Base Frequency

3.5 GHz

2.666 GHz

Performance Core Turbo Frequency

3.9 GHz

6

Total Core Count

4

12

Total Thread Count

8

133 MHz

Bus Frequency

100 MHz

18.0

Multiplier

35.0

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

8 MB shared

No

Unlocked Multiplier

No

2

SMP

1

Memory Parameters

DDR3

Memory Types

DDR3,DDR4

3

Max Memory Channels

2

Yes

ECC Memory Support

Yes

Miscellaneous

2

PCIe Version

3

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