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Differences What are the advantages of each

Front view of AMD Opteron 4340

Reasons to consider the
AMD Opteron 4340

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Significantly lower typical power consumption 77.19W vs 101.56W Around 25% lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
More l3 cache per core 1.33 MB/core vs 1 MB/core Around 35% more l3 cache per core
Higher Maximum operating temperature 67.7 °C vs 61.1 °C More than 10% higher Maximum operating temperature
Significantly lower annual home energy cost 22.89 $/year vs 30.11 $/year Around 25% lower annual home energy cost
Significantly lower annual commercial energy cost 83.22 $/year vs 109.5 $/year Around 25% lower annual commercial energy cost
Front view of AMD FX 8320

Reasons to consider the
AMD FX 8320

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much more l2 cache 8 MB vs 6 MB Around 35% more l2 cache; more data can be stored in the l2 cache for quick access later
Slightly higher turbo clock speed 4 GHz vs 3.8 GHz More than 5% higher turbo clock speed
Significantly better overclocked clock speed (Air) 4.56 GHz vs 3.5 GHz More than 30% better overclocked clock speed (Air)
More cores 8 vs 6 2 more cores; run more applications at once
More threads 8 vs 6 2 more threads
Significantly better overclocked clock speed (Water) 4.75 GHz vs 3.5 GHz More than 35% better overclocked clock speed (Water)

Features Key features of the Opteron 4340  vs FX 8320 

clock speed

Opteron 4340
3.5 GHz
FX 8320
3.5 GHz

turbo clock speed

Opteron 4340
3.8 GHz
FX 8320
4 GHz

L2 cache

FX 8320
8 MB

L3 cache

FX 8320
8 MB

overclocked clock speed (air)

Opteron 4340
3.5 GHz
FX 8320
4.56 GHz

overclocked clock speed (water)

Opteron 4340
3.5 GHz
FX 8320
4.75 GHz

Specifications Full list of technical specs

summary

Opteron 4340  vs
FX 8320 
Clock speed 3.5 GHz 3.5 GHz
Turbo clock speed 3.8 GHz 4 GHz
Cores Hexa core Octa core
Socket type
C32
AM3+
Is unlocked No Yes

features

Has a NX bit Yes Yes
Has virtualization support 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
Supplemental SSE3
AES
TBM
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 125W
Annual home energy cost 22.89 $/year 30.11 $/year
Annual commercial energy cost 83.22 $/year 109.5 $/year
Typical power consumption 77.19W 101.56W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 12,800 MB/s 29,866.66 MB/s

details

Opteron 4340  vs
FX 8320 
Threads 6 8
L2 cache 6 MB 8 MB
L2 cache per core 1 MB/core 1 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 1.33 MB/core 1 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 1
Clock multiplier 17 20
Operating temperature Unknown - 67.7°C Unknown - 61.1°C

overclocking

Overclock popularity 0 63
Overclocked clock speed 3.5 GHz 4.56 GHz
Overclocked clock speed (Water) 3.5 GHz 4.75 GHz
Overclocked clock speed (Air) 3.5 GHz 4.56 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Clock speed 3,200 MHz 2,600 MHz
AMD Opteron 4340
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AMD FX 8320
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