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Differences What are the advantages of each

Front view of AMD Opteron 246

Reasons to consider the
AMD Opteron 246

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Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Higher Maximum operating temperature 71 °C vs 62.5 °C Around 15% higher Maximum operating temperature
Lower typical power consumption 72.31W vs 77.19W More than 5% lower typical power consumption
Lower annual commercial energy cost 77.96 $/year vs 83.22 $/year More than 5% lower annual commercial energy cost
Lower annual home energy cost 21.44 $/year vs 22.89 $/year More than 5% lower annual home energy cost
Front view of AMD FX 6300

Reasons to consider the
AMD FX 6300

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Much more l2 cache 6 MB vs 1 MB 6x 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 2 GHz 75% higher clock speed
Much better performance per watt 9.84 pt/W vs 0.29 pt/W Around 34x better performance per watt
Much better overclocked clock speed (Air) 4.75 GHz vs 2.31 GHz More than 2x better overclocked clock speed (Air)
More cores 6 vs 1 5 more cores; run more applications at once
Newer Oct, 2012 vs Aug, 2003 Release date over 9 years later
Significantly better PassMark score 6,444 vs 632 Around 10.2x better PassMark score
More threads 6 vs 1 5 more threads
Much better overclocked clock speed (Water) 4.82 GHz vs 2 GHz Around 2.5x better overclocked clock speed (Water)

Benchmarks Real world tests of Opteron 246 vs FX 6300

PassMark Data courtesy Passmark

FX 6300
6,444

Specifications Full list of technical specs

summary

Opteron 246  vs
FX 6300 
Clock speed 2 GHz 3.5 GHz
Cores Single core Hexa 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 246  vs
FX 6300 
Threads 1 6
L2 cache 1 MB 6 MB
L2 cache per core 1 MB/core 1 MB/core
Manufacture process 130 nm 32 nm
Max CPUs 2 1
Clock multiplier 10 20
Voltage range 1.5 - UnknownV 0.8 - 1.43V
Operating temperature 0 - 71°C Unknown - 62.5°C

overclocking

Overclocked clock speed 2.31 GHz 4.75 GHz
Overclocked clock speed (Water) 2 GHz 4.82 GHz
PassMark (Overclocked) 851.3 7,541
Overclocked clock speed (Air) 2.31 GHz 4.75 GHz

power consumption

TDP 89W 95W
Annual home energy cost 21.44 $/year 22.89 $/year
Annual commercial energy cost 77.96 $/year 83.22 $/year
Performance per watt 0.29 pt/W 9.84 pt/W
Typical power consumption 72.31W 77.19W
AMD Opteron 246
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AMD FX 6300
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