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Differences What are the advantages of each

Front view of Intel Xeon E5620

Reasons to consider the
Intel Xeon E5620

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Much more l3 cache per core 3 MB/core vs 1.33 MB/core More than 2.2x more l3 cache per core
Significantly lower typical power consumption 65W vs 93.44W More than 30% lower typical power consumption
Significantly lower annual commercial energy cost 70.08 $/year vs 100.74 $/year More than 30% lower annual commercial energy cost
Significantly lower annual home energy cost 19.27 $/year vs 27.7 $/year More than 30% lower annual home energy cost
Front view of AMD Opteron 6242

Reasons to consider the
AMD Opteron 6242

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Much more l2 cache 12 MB vs 1 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 2.8 GHz vs 2.4 GHz More than 15% higher clock speed
Much more l3 cache 16 MB vs 12 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 12 vs 4 Three times as many cores; run more applications at once
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
More threads 12 vs 8 4 more threads
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration

Features Key features of the Xeon E5620  vs Opteron 6242 

clock speed

Xeon E5620
2.4 GHz
Opteron 6242
2.8 GHz

L2 cache

L3 cache

Xeon E5620
12 MB
Opteron 6242
16 MB

TDP

Specifications Full list of technical specs

summary

Xeon E5620  vs
Opteron 6242 
Clock speed 2.4 GHz 2.8 GHz
Cores Quad core Duodeca core
Socket type
LGA 1366
G34

features

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

details

Xeon E5620  vs
Opteron 6242 
Threads 8 12
L2 cache 1 MB 12 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 12 MB 16 MB
L3 cache per core 3 MB/core 1.33 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 4

power consumption

TDP 80W 115W
Annual home energy cost 19.27 $/year 27.7 $/year
Annual commercial energy cost 70.08 $/year 100.74 $/year
Typical power consumption 65W 93.44W

bus

Architecture QPI HyperTransport 3.0
Transfer rate 5,860 MT/s 6,400 MT/s
Clock speed 2,930 MHz 3,200 MHz
Intel Xeon E5620
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AMD Opteron 6242
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