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Differences What are the advantages of each

Front view of Intel Core i7 2600

Reasons to consider the
Intel Core i7 2600

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Much higher clock speed 3.4 GHz vs 1.6 GHz More than 2x higher clock speed
Significantly higher turbo clock speed 3.8 GHz vs 2.8 GHz More than 35% higher turbo clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better overclocked clock speed (Air) 3.93 GHz vs 1.6 GHz Around 2.5x better overclocked clock speed (Air)
Significantly more l3 cache per core 2 MB/core vs 1 MB/core 2x more l3 cache per core
Much better overclocked clock speed (Water) 3.92 GHz vs 1.6 GHz Around 2.5x better overclocked clock speed (Water)
Higher Maximum operating temperature 72.6 °C vs 64 °C Around 15% higher Maximum operating temperature
Front view of AMD Opteron 4256 EE

Reasons to consider the
AMD Opteron 4256 EE

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Much more l2 cache 8 MB vs 1 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Much lower typical power consumption 28.44W vs 114.5W 4x lower typical power consumption
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
More cores 8 vs 4 Twice as many cores; run more applications at once
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual home energy cost 8.43 $/year vs 41.87 $/year 5x lower annual home energy cost
Much lower annual commercial energy cost 30.66 $/year vs 112.13 $/year 3.7x lower annual commercial energy cost
Newer Nov, 2011 vs Jan, 2011 Release date 10 months later

Features Key features of the Core i7 2600  vs Opteron 4256 EE 

clock speed

Core i7 2600
3.4 GHz
Opteron 4256 EE
1.6 GHz

turbo clock speed

Core i7 2600
3.8 GHz
Opteron 4256 EE
2.8 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Core i7 2600
3.93 GHz
Opteron 4256 EE
1.6 GHz

overclocked clock speed (water)

Core i7 2600
3.92 GHz
Opteron 4256 EE
1.6 GHz

Specifications Full list of technical specs

summary

Core i7 2600  vs
Opteron 4256 EE 
Clock speed 3.4 GHz 1.6 GHz
Turbo clock speed 3.8 GHz 2.8 GHz
Cores Quad core Octa core
Socket type
LGA 1155
C32
Is unlocked No 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
Supplemental SSE3
AES

power consumption

TDP 95W 35W
Annual home energy cost 41.87 $/year 8.43 $/year
Annual commercial energy cost 112.13 $/year 30.66 $/year
Typical power consumption 114.5W 28.44W

bus

Architecture DMI HyperTransport 3.0
Number of links 1 2
Transfer rate 5,000 MT/s 6,400 MT/s

details

Core i7 2600  vs
Opteron 4256 EE 
Threads 8 8
L2 cache 1 MB 8 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 1 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 2
Clock multiplier 34 14
Operating temperature Unknown - 72.6°C Unknown - 64°C

overclocking

Overclocked clock speed 3.93 GHz 1.6 GHz
Overclocked clock speed (Water) 3.92 GHz 1.6 GHz
Overclocked clock speed (Air) 3.93 GHz 1.6 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 2000 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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
Intel Core i7 2600
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AMD Opteron 4256 EE
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