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Differences What are the advantages of each

Front view of Intel Xeon L3406

Reasons to consider the
Intel Xeon L3406

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Much lower typical power consumption 24.38W vs 59.31W 2.4x lower typical power consumption
Much lower annual home energy cost 7.23 $/year vs 17.59 $/year 2.4x lower annual home energy cost
Much lower annual commercial energy cost 26.28 $/year vs 63.95 $/year 2.4x lower annual commercial energy cost
Newer Mar, 2010 vs Jan, 2010 Release date 2 months later
Front view of Intel Core i5 660

Reasons to consider the
Intel Core i5 660

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Significantly higher clock speed 3.33 GHz vs 2.26 GHz More than 45% higher clock speed
Much better performance per dollar 3.81 pt/$ vs 0.38 pt/$ Around 10x better performance per dollar
Significantly higher turbo clock speed 3.6 GHz vs 2.53 GHz More than 40% higher turbo clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better overclocked clock speed (Air) 4.28 GHz vs 2.27 GHz Around 90% better overclocked clock speed (Air)
Much better performance per watt 9.23 pt/W vs 2.57 pt/W More than 3.5x better performance per watt
Significantly higher Maximum operating temperature 72.6 °C vs 53.9 °C Around 35% higher Maximum operating temperature
Better geekbench 3 single core score 2,268 vs 1,697 Around 35% better geekbench 3 single core score
Better geekbench 3 Multi-Core score 4,943 vs 3,657 More than 35% better geekbench 3 Multi-Core score
Much better overclocked clock speed (Water) 4.86 GHz vs 2.27 GHz Around 2.2x better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon L3406 vs Core i5 660

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon L3406
3,657
Core i5 660
4,943

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon L3406
1,697
Core i5 660
2,268

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L3406
155.1 MB/s
Core i5 660
1,640,000 MB/s

Specifications Full list of technical specs

summary

Xeon L3406  vs
Core i5 660 
Clock speed 2.26 GHz 3.33 GHz
Turbo clock speed 2.53 GHz 3.6 GHz
Cores Dual core Dual core
Socket type
LGA 1156

features

Has a NX bit Yes Yes
Supports trusted computing Yes 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 30W 73W
Annual home energy cost 7.23 $/year 17.59 $/year
Annual commercial energy cost 26.28 $/year 63.95 $/year
Performance per watt 2.57 pt/W 9.23 pt/W
Typical power consumption 24.38W 59.31W

bus

Architecture DMI DMI
Number of links 1 1
Transfer rate 2,500 MT/s 2,500 MT/s

details

Xeon L3406  vs
Core i5 660 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
L3 cache 4 MB 4 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 32 nm
Transistor count 382,000,000 382,000,000
Max CPUs 1 1
Clock multiplier 17 25
Voltage range 0.65 - 1.4V 0.65 - 1.4V
Operating temperature Unknown - 53.9°C Unknown - 72.6°C

overclocking

Overclocked clock speed 2.27 GHz 4.28 GHz
Overclocked clock speed (Water) 2.27 GHz 4.86 GHz
Overclocked clock speed (Air) 2.27 GHz 4.28 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics
Number of displays supported N/A 2
GPU clock speed N/A 733 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Maximum bandwidth 17,066.66 MB/s 21,333.32 MB/s
Maximum memory size 16,773.12 MB 16,773.12 MB
Intel Xeon L3406
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Intel Core i5 660
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