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Differences What are the advantages of each

Front view of Intel Xeon E3-1220 v2

Reasons to consider the
Intel Xeon E3-1220 v2

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Significantly higher clock speed 3.1 GHz vs 2.2 GHz More than 40% higher clock speed
Significantly newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly better overclocked clock speed (Air) 3.45 GHz vs 2.2 GHz More than 55% better overclocked clock speed (Air)
Significantly better overclocked clock speed (Water) 3.1 GHz vs 2.2 GHz More than 40% better overclocked clock speed (Water)
Newer May, 2012 vs Nov, 2011 Release date 6 months later
Front view of AMD Opteron 42DX EE

Reasons to consider the
AMD Opteron 42DX EE

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Much more l2 cache 4 MB vs 1 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Significantly lower typical power consumption 32.5W vs 56.06W More than 40% lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Significantly lower annual home energy cost 9.64 $/year vs 16.62 $/year More than 40% lower annual home energy cost
Significantly lower annual commercial energy cost 35.04 $/year vs 60.44 $/year More than 40% lower annual commercial energy cost

Features Key features of the Xeon E3-1220 v2  vs Opteron 42DX EE 

clock speed

L2 cache

L3 cache

overclocked clock speed (air)

Xeon E3-1220 v2
3.45 GHz
Opteron 42DX EE
2.2 GHz

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Xeon E3-1220 v2  vs
Opteron 42DX EE 
Clock speed 3.1 GHz 2.2 GHz
Cores Quad core Quad core
Socket type
LGA 1155
C32

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES

bus

Architecture DMI HyperTransport 3.0
Transfer rate 5,000 MT/s 6,400 MT/s

details

Xeon E3-1220 v2  vs
Opteron 42DX EE 
Threads 4 4
L2 cache 1 MB 4 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 1 2
Clock multiplier 31 16

overclocking

Overclocked clock speed 3.45 GHz 2.2 GHz
Overclocked clock speed (Water) 3.1 GHz 2.2 GHz
Overclocked clock speed (Air) 3.45 GHz 2.2 GHz

power consumption

TDP 69W 40W
Annual home energy cost 16.62 $/year 9.64 $/year
Annual commercial energy cost 60.44 $/year 35.04 $/year
Typical power consumption 56.06W 32.5W
Intel Xeon E3-1220 v2
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AMD Opteron 42DX EE
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