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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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Much higher clock speed 3.4 GHz vs 1.8 GHz Around 90% 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
Much better overclocked clock speed (Air) 5.05 GHz vs 2.7 GHz More than 85% better overclocked clock speed (Air)
More threads 8 vs 2 6 more threads
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 4.76 GHz vs 1.8 GHz Around 2.8x better overclocked clock speed (Water)
Front view of AMD Athlon 64 X2 3400e

Reasons to consider the
AMD Athlon 64 X2 3400e

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Much lower typical power consumption 17.88W vs 114.2W 6.4x lower typical power consumption
Much lower annual home energy cost 5.3 $/year vs 41.8 $/year 7.9x lower annual home energy cost
Much lower annual commercial energy cost 19.27 $/year vs 111.78 $/year 5.8x lower annual commercial energy cost
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core

Features Key features of the Core i7 2600K  vs Athlon 64 X2 3400e 

clock speed

L2 cache

overclocked clock speed (air)

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Core i7 2600K  vs
Athlon 64 X2 3400e 
Clock speed 3.4 GHz 1.8 GHz
Cores Quad core Dual core
Socket type
LGA 1155
AM2

features

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

details

Core i7 2600K  vs
Athlon 64 X2 3400e 
Threads 8 2
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 32 nm 65 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 5.05 GHz 2.7 GHz
Overclocked clock speed (Water) 4.76 GHz 1.8 GHz
Overclocked clock speed (Air) 5.05 GHz 2.7 GHz

power consumption

TDP 95W 22W
Annual home energy cost 41.8 $/year 5.3 $/year
Annual commercial energy cost 111.78 $/year 19.27 $/year
Typical power consumption 114.2W 17.88W
Intel Core i7 2600K
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AMD Athlon 64 X2 3400e
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