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Differences What are the advantages of each

Front view of Intel Core i7 3770K

Reasons to consider the
Intel Core i7 3770K

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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
Significantly higher clock speed 3.5 GHz vs 2.6 GHz Around 35% higher clock speed
Much better PassMark score 9,544 vs 760 More than 12.5x better PassMark score
Much better overclocked clock speed (Air) 4.69 GHz vs 2.73 GHz More than 70% better overclocked clock speed (Air)
Newer Apr, 2012 vs Feb, 2005 Release date over 7 years later
More threads 8 vs 1 7 more threads
More cores 4 vs 1 3 more cores; run more applications at once
Significantly better performance per watt 4.55 pt/W vs 0.46 pt/W Around 10x better performance per watt
Much better overclocked clock speed (Water) 4.8 GHz vs 2.6 GHz Around 85% better overclocked clock speed (Water)
Front view of AMD Opteron 252

Reasons to consider the
AMD Opteron 252

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Much lower typical power consumption 55.25W vs 114.97W 2.1x lower typical power consumption
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual home energy cost 16.38 $/year vs 42.19 $/year 2.6x lower annual home energy cost
Much lower annual commercial energy cost 59.57 $/year vs 112.39 $/year More than 45% lower annual commercial energy cost

Benchmarks Real world tests of Core i7 3770K vs Opteron 252

PassMark Data courtesy Passmark

Specifications Full list of technical specs

summary

Core i7 3770K  vs
Opteron 252 
Clock speed 3.5 GHz 2.6 GHz
Cores Quad core Single core
Socket type
LGA 1155
940

features

Has a NX bit 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 3770K  vs
Opteron 252 
Threads 8 1
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 22 nm 90 nm
Max CPUs 1 2
Clock multiplier 35 13
Voltage range 1.33 - 1.36V 1.3 - UnknownV
Operating temperature Unknown - 67.4°C 0 - 67°C

overclocking

Overclocked clock speed 4.69 GHz 2.73 GHz
Overclocked clock speed (Water) 4.8 GHz 2.6 GHz
PassMark (Overclocked) 6,731.8 1,037.9
Overclocked clock speed (Air) 4.69 GHz 2.73 GHz

power consumption

TDP 77W 68W
Annual home energy cost 42.19 $/year 16.38 $/year
Annual commercial energy cost 112.39 $/year 59.57 $/year
Performance per watt 4.55 pt/W 0.46 pt/W
Typical power consumption 114.97W 55.25W
Intel Core i7 3770K
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AMD Opteron 252
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