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Differences What are the advantages of each

Front view of Intel Xeon 5120

Reasons to consider the
Intel Xeon 5120

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Much more l2 cache per core 2 MB/core vs 1 MB/core 2x more l2 cache per core
Much lower typical power consumption 52.81W vs 93.44W Around 45% lower typical power consumption
Much lower annual commercial energy cost 56.94 $/year vs 100.74 $/year Around 45% lower annual commercial energy cost
Much lower annual home energy cost 15.66 $/year vs 27.7 $/year Around 45% 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 4 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 2.8 GHz vs 1.86 GHz More than 50% higher clock speed
More cores 12 vs 2 10 more cores; run more applications at once
More threads 12 vs 2 10 more threads
Significantly newer manufacturing process 32 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration

Features Key features of the Xeon 5120  vs Opteron 6242 

clock speed

Xeon 5120
1.86 GHz
Opteron 6242
2.8 GHz

L2 cache

Xeon 5120
4 MB
Opteron 6242
12 MB

TDP

Specifications Full list of technical specs

summary

Xeon 5120  vs
Opteron 6242 
Clock speed 1.86 GHz 2.8 GHz
Cores Dual core Duodeca core
Socket type
LGA 771
G34

features

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

details

Xeon 5120  vs
Opteron 6242 
Threads 2 12
L2 cache 4 MB 12 MB
L2 cache per core 2 MB/core 1 MB/core
Manufacture process 65 nm 32 nm
Max CPUs 2 4

power consumption

TDP 65W 115W
Annual home energy cost 15.66 $/year 27.7 $/year
Annual commercial energy cost 56.94 $/year 100.74 $/year
Typical power consumption 52.81W 93.44W

bus

Architecture FSB HyperTransport 3.0
Clock speed 1,066 MHz 3,200 MHz
Intel Xeon 5120
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AMD Opteron 6242
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