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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 77.19W 3.2x lower typical power consumption
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Much lower annual home energy cost 7.23 $/year vs 22.89 $/year 3.2x lower annual home energy cost
Much lower annual commercial energy cost 26.28 $/year vs 83.22 $/year 3.2x lower annual commercial energy cost
Front view of Intel Core i5 2500

Reasons to consider the
Intel Core i5 2500

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Significantly higher clock speed 3.3 GHz vs 2.26 GHz More than 45% higher clock speed
Significantly higher turbo clock speed 3.7 GHz vs 2.53 GHz More than 45% higher turbo clock speed
Much better performance per dollar 2.86 pt/$ vs 0.38 pt/$ Around 7.5x better performance per dollar
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better geekbench 3 Multi-Core score 8,816 vs 3,657 Around 2.5x better geekbench 3 Multi-Core score
Much better performance per watt 9.04 pt/W vs 2.57 pt/W More than 3.5x better performance per watt
Significantly better geekbench 3 single core score 2,796 vs 1,697 Around 65% better geekbench 3 single core score
Much better overclocked clock speed (Air) 3.7 GHz vs 2.27 GHz Around 65% better overclocked clock speed (Air)
Slightly more l3 cache 6 MB vs 4 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
Significantly higher Maximum operating temperature 72.6 °C vs 53.9 °C Around 35% higher Maximum operating temperature
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 4.21 GHz vs 2.27 GHz More than 85% better overclocked clock speed (Water)
Newer Jan, 2011 vs Mar, 2010 Release date 9 months later

Benchmarks Real world tests of Xeon L3406 vs Core i5 2500

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon L3406
3,657
Core i5 2500
8,816

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon L3406
1,697
Core i5 2500
2,796

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L3406
155.1 MB/s
Core i5 2500
2,410,000 MB/s

Specifications Full list of technical specs

summary

Xeon L3406  vs
Core i5 2500 
Clock speed 2.26 GHz 3.3 GHz
Turbo clock speed 2.53 GHz 3.7 GHz
Cores Dual core Quad core
Socket type
LGA 1156
LGA 1155

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 30W 95W
Annual home energy cost 7.23 $/year 22.89 $/year
Annual commercial energy cost 26.28 $/year 83.22 $/year
Performance per watt 2.57 pt/W 9.04 pt/W
Typical power consumption 24.38W 77.19W

bus

Architecture DMI DMI
Number of links 1 1
Transfer rate 2,500 MT/s 5,000 MT/s

details

Xeon L3406  vs
Core i5 2500 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.25 MB/core
L3 cache 4 MB 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 1
Clock multiplier 17 33
Operating temperature Unknown - 53.9°C Unknown - 72.6°C

overclocking

Overclocked clock speed 2.27 GHz 3.7 GHz
Overclocked clock speed (Water) 2.27 GHz 4.21 GHz
Overclocked clock speed (Air) 2.27 GHz 3.7 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 2000
Number of displays supported N/A 2
GPU clock speed N/A 850 MHz
Turbo clock speed N/A 1,100 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 17,066.66 MB/s 21,333.32 MB/s
Maximum memory size 16,773.12 MB 32,768 MB
Intel Xeon L3406
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Intel Core i5 2500
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