CPUBoss Review Our evaluation of L7455 vs L5640 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

5.3

CPUBoss Score

Combination of all six facets

Winner
Intel Xeon L5640 

CPUBoss recommends the Intel Xeon L5640  based on its performance, single-core performance, cost to run and value.

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VS
Front view of Intel Xeon L5640

Intel Xeon L5640

CPUBoss Winner

Differences What are the advantages of each

Front view of Intel Xeon L7455

Reasons to consider the
Intel Xeon L7455

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Much more l2 cache 12 MB vs 2 MB 6x 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 0.33 MB/core More than 6x more l2 cache per core
Front view of Intel Xeon L5640

Reasons to consider the
Intel Xeon L5640

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Much better PassMark score 6,451 vs 3,836 Around 70% better PassMark score
Much better overclocked clock speed (Air) 3.9 GHz vs 2.13 GHz Around 85% better overclocked clock speed (Air)
Much better performance per watt 10.46 pt/W vs 2.87 pt/W Around 3.8x better performance per watt
Higher clock speed 2.26 GHz vs 2.13 GHz More than 5% higher clock speed
More threads 12 vs 6 Twice as many threads
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Better overclocked clock speed (Water) 2.27 GHz vs 2.13 GHz More than 5% better overclocked clock speed (Water)
Newer Mar, 2010 vs Sep, 2008 Release date over 1 years later

Benchmarks Real world tests of Xeon L7455 vs L5640

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon L7455
19,744
Xeon L5640
16,852

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon L7455
1,167
Xeon L5640
1,918

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L7455
108 MB/s
Xeon L5640
1,250,000 MB/s

PassMark Data courtesy Passmark

Xeon L7455
3,836
Xeon L5640
6,451

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon L7455  vs
L5640 
Clock speed 2.13 GHz 2.26 GHz
Cores Hexa core Hexa 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 65W 60W
Annual home energy cost 15.66 $/year 14.45 $/year
Annual commercial energy cost 56.94 $/year 52.56 $/year
Performance per watt 2.87 pt/W 10.46 pt/W
Typical power consumption 52.81W 48.75W

bus

Architecture FSB QPI
Number of links 1 2
Clock speed 1,066 MHz 2,930 MHz

details

Xeon L7455  vs
L5640 
Architecture x86-64 x86-64
Threads 6 12
L2 cache 12 MB 2 MB
L2 cache per core 2 MB/core 0.33 MB/core
L3 cache 12 MB 12 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 32 2
Clock multiplier 8 17
Voltage range 0.9 - 1.45V 0.75 - 1.35V
Operating temperature Unknown - 73°C Unknown - 69.4°C

overclocking

Overclocked clock speed 2.13 GHz 3.9 GHz
Overclocked clock speed (Water) 2.13 GHz 2.27 GHz
Overclocked clock speed (Air) 2.13 GHz 3.9 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
Intel Xeon L7455
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Intel Xeon L5640
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