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Differences What are the advantages of each

Front view of Intel Xeon E3-1220

Reasons to consider the
Intel Xeon E3-1220

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Much higher clock speed 3.1 GHz vs 2 GHz More than 55% higher clock speed
Much more l3 cache 8 MB vs 4 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Air) 3.49 GHz vs 2 GHz Around 75% better overclocked clock speed (Air)
More threads 4 vs 2 Twice as many threads
Much better overclocked clock speed (Water) 3.1 GHz vs 2 GHz More than 55% better overclocked clock speed (Water)
Newer Apr, 2011 vs May, 2010 Release date 10 months later
Front view of Intel Xeon 3400 L3403

Reasons to consider the
Intel Xeon 3400 L3403

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Much lower typical power consumption 24.38W vs 65W 2.7x lower typical power consumption
Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual commercial energy cost 26.28 $/year vs 70.08 $/year 2.7x lower annual commercial energy cost
Much lower annual home energy cost 7.23 $/year vs 19.27 $/year 2.7x lower annual home energy cost

Features Key features of the Xeon E3-1220  vs 3400 L3403 

clock speed

L2 cache

L3 cache

overclocked clock speed (air)

Xeon E3-1220
3.49 GHz

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Xeon E3-1220  vs
3400 L3403 
Clock speed 3.1 GHz 2 GHz
Cores Quad core Dual core
Socket type
LGA 1155
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
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

bus

Architecture DMI DMI
Transfer rate 5,000 MT/s 2,500 MT/s

details

Xeon E3-1220  vs
3400 L3403 
Threads 4 2
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 4 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.49 GHz 2 GHz
Overclocked clock speed (Water) 3.1 GHz 2 GHz
Overclocked clock speed (Air) 3.49 GHz 2 GHz

power consumption

TDP 80W 30W
Annual home energy cost 19.27 $/year 7.23 $/year
Annual commercial energy cost 70.08 $/year 26.28 $/year
Typical power consumption 65W 24.38W
Intel Xeon E3-1220
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Intel Xeon 3400 L3403
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