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Differences What are the advantages of each

Front view of AMD Opteron 842

Reasons to consider the
AMD Opteron 842

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Supports more CPUs in SMP configuration 8 vs 1 7 supports more CPUs in SMP configuration
Lower typical power consumption 66.71W vs 77.19W Around 15% lower typical power consumption
Higher Maximum operating temperature 71 °C vs 62.5 °C Around 15% higher Maximum operating temperature
Lower annual home energy cost 19.78 $/year vs 22.89 $/year Around 15% lower annual home energy cost
Lower annual commercial energy cost 71.92 $/year vs 83.22 $/year Around 15% lower annual commercial 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 1.6 GHz Around 2.2x higher clock speed
Much better overclocked clock speed (Air) 4.75 GHz vs 1.76 GHz Around 2.8x better overclocked clock speed (Air)
More cores 6 vs 1 5 more cores; run more applications at once
Newer Oct, 2012 vs Jun, 2003 Release date over 9 years later
More threads 6 vs 1 5 more threads
Much better overclocked clock speed (Water) 4.82 GHz vs 1.6 GHz More than 3x better overclocked clock speed (Water)

Features Key features of the Opteron 842  vs FX 6300 

clock speed

Opteron 842
1.6 GHz
FX 6300
3.5 GHz

L2 cache

FX 6300
6 MB

overclocked clock speed (air)

Opteron 842
1.76 GHz
FX 6300
4.75 GHz

overclocked clock speed (water)

Opteron 842
1.6 GHz
FX 6300
4.82 GHz

TDP

Opteron 842
82.1W
FX 6300
95W

Specifications Full list of technical specs

summary

Opteron 842  vs
FX 6300 
Clock speed 1.6 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 842  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 8 1
Clock multiplier 8 20
Voltage range 1.5 - UnknownV 0.8 - 1.43V
Operating temperature 0 - 71°C Unknown - 62.5°C

overclocking

Overclocked clock speed 1.76 GHz 4.75 GHz
Overclocked clock speed (Water) 1.6 GHz 4.82 GHz
PassMark (Overclocked) 736.3 7,541
Overclocked clock speed (Air) 1.76 GHz 4.75 GHz

power consumption

TDP 82.1W 95W
Annual home energy cost 19.78 $/year 22.89 $/year
Annual commercial energy cost 71.92 $/year 83.22 $/year
Typical power consumption 66.71W 77.19W
AMD Opteron 842
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AMD FX 6300
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