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Differences What are the advantages of each

Front view of Intel Core i7 2600K

Reasons to consider the
Intel Core i7 2600K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much higher clock speed 3.4 GHz vs 1.7 GHz 2x higher clock speed
Much newer manufacturing process 32 nm vs 65 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
More l3 cache 8 MB vs 2 MB 4x more l3 cache; more data can be stored in the l3 cache for quick access later
Much better overclocked clock speed (Air) 5.05 GHz vs 1.7 GHz Around 3x better overclocked clock speed (Air)
Much more l3 cache per core 2 MB/core vs 0.5 MB/core 4x more l3 cache per core
Significantly higher Maximum operating temperature 72.6 °C vs 55 °C More than 30% higher Maximum operating temperature
More threads 8 vs 4 Twice as many threads
Newer Jan, 2011 vs Sep, 2007 Release date over 3 years later
Much better overclocked clock speed (Water) 4.76 GHz vs 1.7 GHz More than 2.8x better overclocked clock speed (Water)
Front view of AMD Opteron 2344 HE

Reasons to consider the
AMD Opteron 2344 HE

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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
Much lower typical power consumption 44.69W vs 114.2W 2.6x lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual home energy cost 13.25 $/year vs 41.8 $/year 3.2x lower annual home energy cost
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual commercial energy cost 48.18 $/year vs 111.78 $/year 2.3x lower annual commercial energy cost

Features Key features of the Core i7 2600K  vs Opteron 2344 HE 

clock speed

Core i7 2600K
3.4 GHz
Opteron 2344 HE
1.7 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Core i7 2600K
5.05 GHz
Opteron 2344 HE
1.7 GHz

overclocked clock speed (water)

Core i7 2600K
4.76 GHz
Opteron 2344 HE
1.7 GHz

Specifications Full list of technical specs

summary

Core i7 2600K  vs
Opteron 2344 HE 
Clock speed 3.4 GHz 1.7 GHz
Cores Quad core Quad core
Socket type
LGA 1155
F
Is unlocked Yes No

features

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

power consumption

TDP 95W 55W
Annual home energy cost 41.8 $/year 13.25 $/year
Annual commercial energy cost 111.78 $/year 48.18 $/year
Typical power consumption 114.2W 44.69W

details

Core i7 2600K  vs
Opteron 2344 HE 
Threads 8 4
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 2 MB
L3 cache per core 2 MB/core 0.5 MB/core
Manufacture process 32 nm 65 nm
Max CPUs 1 2
Clock multiplier 34 8
Voltage range 0.85 - 1.45V 1.1 - UnknownV
Operating temperature Unknown - 72.6°C 0 - 55°C

overclocking

Overclocked clock speed 5.05 GHz 1.7 GHz
Overclocked clock speed (Water) 4.76 GHz 1.7 GHz
Overclocked clock speed (Air) 5.05 GHz 1.7 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 3000 N/A
Latest DirectX 10.x N/A
Number of displays supported 2 N/A
GPU clock speed 850 MHz N/A
Turbo clock speed 1,350 MHz N/A
3DMark06 5,275 N/A
Intel Core i7 2600K
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AMD Opteron 2344 HE
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