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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 2.4 GHz More than 45% higher clock speed
Much better geekbench 3 Multi-Core score 13,098 vs 1,379 Around 9.5x better geekbench 3 Multi-Core score
Much better geekbench 3 single core score 3,304 vs 922 More than 3.5x better geekbench 3 single core score
Much better overclocked clock speed (Air) 4.69 GHz vs 2.56 GHz Around 85% better overclocked clock speed (Air)
Newer Apr, 2012 vs Sep, 2005 Release date over 6 years later
More threads 8 vs 2 6 more threads
Significantly better performance per watt 4.55 pt/W vs 0.75 pt/W More than 6x better performance per watt
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 4.8 GHz vs 2.4 GHz More than 2x better overclocked clock speed (Water)
Front view of AMD Opteron 880

Reasons to consider the
AMD Opteron 880

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Supports more CPUs in SMP configuration 8 vs 1 7 supports more CPUs in SMP configuration
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 77.19W vs 114.97W Around 35% lower typical power consumption
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Much lower annual home energy cost 22.89 $/year vs 42.19 $/year More than 45% lower annual home energy cost
Significantly lower annual commercial energy cost 83.22 $/year vs 112.39 $/year More than 25% lower annual commercial energy cost

Benchmarks Real world tests of Core i7 3770K vs Opteron 880

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i7 3770K
13,098
Opteron 880
1,379

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 3770K
2,620,000 MB/s
Opteron 880
63,500 MB/s

Specifications Full list of technical specs

summary

Core i7 3770K  vs
Opteron 880 
Clock speed 3.5 GHz 2.4 GHz
Cores Quad core Dual 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 880 
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 8
Clock multiplier 35 12
Voltage range 1.33 - 1.36V 1 - UnknownV
Operating temperature Unknown - 67.4°C 0 - 67°C

overclocking

Overclocked clock speed 4.69 GHz 2.56 GHz
Overclocked clock speed (Water) 4.8 GHz 2.4 GHz
Overclocked clock speed (Air) 4.69 GHz 2.56 GHz

power consumption

TDP 77W 95W
Annual home energy cost 42.19 $/year 22.89 $/year
Annual commercial energy cost 112.39 $/year 83.22 $/year
Performance per watt 4.55 pt/W 0.75 pt/W
Typical power consumption 114.97W 77.19W
Intel Core i7 3770K
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AMD Opteron 880
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