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Differences What are the advantages of each

Front view of Intel Core i7 4770K

Reasons to consider the
Intel Core i7 4770K

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Much newer manufacturing process 22 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher clock speed 3.5 GHz vs 1.8 GHz Around 95% higher clock speed
Much better geekbench 2 (32-bit) score 14,351 vs 1,882 Around 7.8x better geekbench 2 (32-bit) score
Much better PassMark (Single core) score 2,165 vs 554 Around 4x better PassMark (Single core) score
Much better performance per watt 11.31 pt/W vs 1 pt/W More than 11.2x better performance per watt
Much better PassMark score 10,016 vs 899 Around 11.2x better PassMark score
Much better overclocked clock speed (Air) 4.48 GHz vs 2 GHz Around 2.2x better overclocked clock speed (Air)
Newer Jun, 2013 vs Aug, 2005 Release date over 7 years later
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) 4.55 GHz vs 1.8 GHz More than 2.5x better overclocked clock speed (Water)
Higher Maximum operating temperature 72.72 °C vs 65 °C More than 10% higher Maximum operating temperature
Front view of AMD Opteron 165 HE

Reasons to consider the
AMD Opteron 165 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 more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Significantly lower typical power consumption 44.69W vs 68.25W Around 35% lower typical power consumption
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

Benchmarks Real world tests of Core i7 4770K vs Opteron 165 HE

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 4770K
4,810,000 MB/s
Opteron 165 HE
49,700 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 4770K  vs
Opteron 165 HE 
Clock speed 3.5 GHz 1.8 GHz
Cores Quad core Dual core

features

Has a NX bit Yes Yes
Instruction set extensions
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

details

Core i7 4770K  vs
Opteron 165 HE 
Threads 8 2
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 22 nm 90 nm
Max CPUs 1 1
Operating temperature Unknown - 72.72°C 0 - 65°C

overclocking

Overclocked clock speed 4.48 GHz 2 GHz
Overclocked clock speed (Water) 4.55 GHz 1.8 GHz
Overclocked clock speed (Air) 4.48 GHz 2 GHz

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
Performance per watt 11.31 pt/W 1 pt/W
Typical power consumption 68.25W 44.69W
Intel Core i7 4770K
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AMD Opteron 165 HE
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