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Differences What are the advantages of each

Front view of Intel Core i5 4670K

Reasons to consider the
Intel Core i5 4670K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Significantly higher clock speed 3.4 GHz vs 2.4 GHz More than 40% higher clock speed
Much newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better overclocked clock speed (Air) 4.48 GHz vs 2.4 GHz More than 85% better overclocked clock speed (Air)
Significantly higher Maximum operating temperature 72.72 °C vs 55 °C More than 30% higher Maximum operating temperature
Newer Apr, 2013 vs Apr, 2009 Release date over 4 years later
Much better overclocked clock speed (Water) 4.55 GHz vs 2.4 GHz Around 90% better overclocked clock speed (Water)
Front view of AMD Opteron 8379 HE

Reasons to consider the
AMD Opteron 8379 HE

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Supports more CPUs in SMP configuration 8 vs 1 7 supports more CPUs in SMP configuration
Significantly more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly lower typical power consumption 44.69W vs 68.25W Around 35% lower typical power consumption
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Significantly lower annual home energy cost 13.25 $/year vs 20.24 $/year Around 35% lower annual home energy cost
Significantly lower annual commercial energy cost 48.18 $/year vs 73.58 $/year Around 35% lower annual commercial energy cost

Features Key features of the Core i5 4670K  vs Opteron 8379 HE 

clock speed

Core i5 4670K
3.4 GHz
Opteron 8379 HE
2.4 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Core i5 4670K
4.48 GHz
Opteron 8379 HE
2.4 GHz

overclocked clock speed (water)

Core i5 4670K
4.55 GHz
Opteron 8379 HE
2.4 GHz

Specifications Full list of technical specs

summary

Core i5 4670K  vs
Opteron 8379 HE 
Clock speed 3.4 GHz 2.4 GHz
Cores Quad core Quad core
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
F16C
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
FMA3
SSE4.2
3DNow!
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 84W 55W
Annual home energy cost 20.24 $/year 13.25 $/year
Annual commercial energy cost 73.58 $/year 48.18 $/year
Typical power consumption 68.25W 44.69W

details

Core i5 4670K  vs
Opteron 8379 HE 
Threads 4 4
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 6 MB 6 MB
L3 cache per core 1.5 MB/core 1.5 MB/core
Manufacture process 22 nm 45 nm
Max CPUs 1 8
Operating temperature Unknown - 72.72°C 0 - 55°C

overclocking

Overclocked clock speed 4.48 GHz 2.4 GHz
Overclocked clock speed (Water) 4.55 GHz 2.4 GHz
Overclocked clock speed (Air) 4.48 GHz 2.4 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 4600 N/A
Number of displays supported 3 N/A
GPU clock speed 350 MHz N/A
Turbo clock speed 1,200 MHz N/A

bus

Architecture DMI 2.0 HyperTransport 3.0
Intel Core i5 4670K
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AMD Opteron 8379 HE
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