CPUBoss Review Our evaluation of E5405 vs Q6600


Benchmark performance using all cores

Passmark and GeekBench

Single-core Performance

Individual core benchmark performance

Passmark (Single Core)

Power Consumption

How much power does the processor require?



Performance Per Dollar

CPUBoss Score

Performance, Single-core Performance, Power Consumption and Value

Intel Core2 Quad Q6600 

CPUBoss recommends the Intel Core2 Quad Q6600  based on its .

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Differences What are the advantages of each

Front view of Intel Xeon E5405

Reasons to consider the
Intel Xeon E5405

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Newer manufacturing process 45 nms vs 65 nms A newer manufacturing process allows for a more powerful, yet cooler running processor
More l2 cache 12 MB vs 8 MB 50% more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 3 MB/core vs 2 MB/core 50% more l2 cache per core
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Lower typical power consumption 65W vs 85.31W Around 25% lower typical power consumption
Higher Maximum Operating Temperature 67 °C vs 62.2 °C Around 10% higher Maximum Operating Temperature
Newer Nov, 2007 vs Jan, 2007 Release date 10 months later
Lower annual commercial energy cost 70.08 $/year vs 91.98 $/year Around 25% lower annual commercial energy cost
Lower annual home energy cost 19.27 $/year vs 25.29 $/year Around 25% lower annual home energy cost
Front view of Intel Core2 Quad Q6600

Reasons to consider the
Intel Core2 Quad Q6600

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Higher clock speed 2.4 GHz vs 2 GHz Around 20% higher clock speed

Benchmarks Real world tests of Xeon E5405 vs Core2 Quad Q6600

Specifications Full list of technical specs


Xeon E5405  vs
Core2 Quad Q6600 
Clock speed 2 GHz 2.4 GHz
Cores Quad core Quad core
Socket type
LGA 771
LGA 775
Is hyperthreaded No No


Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 80W 105W
Annual home energy cost 19.27 $/year 25.29 $/year
Annual commercial energy cost 70.08 $/year 91.98 $/year
Performance per watt 5.6 pt/W 4.21 pt/W
Typical power consumption 65W 85.31W


Architecture FSB FSB
Number of links 1 1
Clock speed 1,333 MHz 1,066 MHz


Xeon E5405  vs
Core2 Quad Q6600 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 12 MB 8 MB
L2 cache per core 3 MB/core 2 MB/core
Manufacture process 45 nms 65 nms
Transistor count 820,000,000 582,000,000
Max CPUs 2 1
Clock multiplier 6 9
Voltage range 0.85 - 1.35V 0.85 - 1.5V
Operating temperature Unknown - 67°C Unknown - 62.2°C


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 E5405
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Intel Core2 Quad Q6600
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