CPUBoss Review Our evaluation of E7340 vs E5640 among all CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

5.2

CPUBoss Score

Combination of all six facets

Winner
Intel Xeon E5640 

CPUBoss recommends the Intel Xeon E5640  based on its value.

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VS

Differences What are the advantages of each

Front view of Intel Xeon E7340

Reasons to consider the
Intel Xeon E7340

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Much more l2 cache 8 MB vs 1 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Supports more CPUs in SMP configuration 32 vs 2 30 supports more CPUs in SMP configuration
Much more l2 cache per core 2 MB/core vs 0.25 MB/core 8x more l2 cache per core
Front view of Intel Xeon E5640

Reasons to consider the
Intel Xeon E5640

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Significantly higher clock speed 2.66 GHz vs 2.4 GHz More than 10% higher clock speed
Much better overclocked clock speed (Air) 4.24 GHz vs 2.4 GHz More than 75% better overclocked clock speed (Air)
Much better performance per watt 7.32 pt/W vs 2.24 pt/W More than 3.2x better performance per watt
Significantly newer manufacturing process 32 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More threads 8 vs 4 Twice as many threads
Much better overclocked clock speed (Water) 4.41 GHz vs 2.4 GHz Around 85% better overclocked clock speed (Water)
Newer Mar, 2010 vs Sep, 2007 Release date over 2 years later

Benchmarks Real world tests of Xeon E7340 vs E5640

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E7340
14,972
Xeon E5640
8,170

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E7340
1,259
Xeon E5640
2,008

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E7340
143.6 MB/s
Xeon E5640
1,300,000 MB/s

Specifications Full list of technical specs

summary

Xeon E7340  vs
E5640 
Clock speed 2.4 GHz 2.66 GHz
Cores Quad core Quad core
Socket type
604
LGA 1366

features

Has a NX bit Yes Yes
Supports trusted computing No Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 80W 80W
Annual home energy cost 19.27 $/year 19.27 $/year
Annual commercial energy cost 70.08 $/year 70.08 $/year
Performance per watt 2.24 pt/W 7.32 pt/W
Typical power consumption 65W 65W

details

Xeon E7340  vs
E5640 
Architecture x86-64 x86-64
Threads 4 8
L2 cache 8 MB 1 MB
L2 cache per core 2 MB/core 0.25 MB/core
Manufacture process 65 nm 32 nm
Max CPUs 32 2
Clock multiplier 9 20
Voltage range 1 - 1.5V 0.75 - 1.35V
Operating temperature Unknown - 66°C Unknown - 77.6°C

overclocking

Overclocked clock speed 2.4 GHz 4.24 GHz
Overclocked clock speed (Water) 2.4 GHz 4.41 GHz
Overclocked clock speed (Air) 2.4 GHz 4.24 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Architecture FSB QPI
Number of links 1 2
Clock speed 1,066 MHz 2,930 MHz
Intel Xeon E7340
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Intel Xeon E5640
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