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Differences What are the advantages of each

Front view of AMD Opteron 142

Reasons to consider the
AMD Opteron 142

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Much lower typical power consumption 66.71W vs 101.56W Around 35% lower typical power consumption
Much lower annual home energy cost 19.78 $/year vs 30.11 $/year Around 35% lower annual home energy cost
Much lower annual commercial energy cost 71.92 $/year vs 109.5 $/year Around 35% lower annual commercial energy cost
Front view of AMD FX 8320

Reasons to consider the
AMD FX 8320

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Much more l2 cache 8 MB vs 1 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Much newer manufacturing process 32 nm vs 130 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher clock speed 3.5 GHz vs 1.6 GHz Around 2.2x higher clock speed
More cores 8 vs 1 7 more cores; run more applications at once
Much better overclocked clock speed (Air) 4.56 GHz vs 1.6 GHz More than 2.8x better overclocked clock speed (Air)
Much better PassMark score 8,183 vs 428 More than 19x better PassMark score
Much better performance per watt 7.79 pt/W vs 0.21 pt/W More than 36.5x better performance per watt
Newer Oct, 2012 vs Sep, 2003 Release date over 9 years later
More threads 8 vs 1 7 more threads
Much better overclocked clock speed (Water) 4.75 GHz vs 1.6 GHz Around 3x better overclocked clock speed (Water)

Benchmarks Real world tests of Opteron 142 vs FX 8320

PassMark Data courtesy Passmark

FX 8320
8,183

Specifications Full list of technical specs

summary

Opteron 142  vs
FX 8320 
Clock speed 1.6 GHz 3.5 GHz
Cores Single core Octa core
Socket type
940
AM3+

features

Has a NX bit Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
XOP
AVX
SSE3
SSE
ABM
BMI1
CLMUL
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
CVT16
AMD-V
3DNow!
Supplemental SSE3
AES
TBM
Supports dynamic frequency scaling Yes Yes

details

Opteron 142  vs
FX 8320 
Threads 1 8
L2 cache 1 MB 8 MB
L2 cache per core 1 MB/core 1 MB/core
Manufacture process 130 nm 32 nm
Max CPUs 1 1
Clock multiplier 8 20
Voltage range 1.3 - UnknownV 0.8 - 1.43V

overclocking

Overclocked clock speed 1.6 GHz 4.56 GHz
Overclocked clock speed (Water) 1.6 GHz 4.75 GHz
Overclocked clock speed (Air) 1.6 GHz 4.56 GHz

power consumption

TDP 82.1W 125W
Annual home energy cost 19.78 $/year 30.11 $/year
Annual commercial energy cost 71.92 $/year 109.5 $/year
Performance per watt 0.21 pt/W 7.79 pt/W
Typical power consumption 66.71W 101.56W
AMD Opteron 142
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AMD FX 8320
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