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Differences What are the advantages of each

Front view of Intel Core i7 3960X

Reasons to consider the
Intel Core i7 3960X

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Much newer manufacturing process 32 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better geekbench 3 Multi-Core score 18,528 vs 1,379 Around 13.5x better geekbench 3 Multi-Core score
Significantly higher clock speed 3.3 GHz vs 2.4 GHz Around 40% higher clock speed
Much better geekbench 3 single core score 3,267 vs 922 More than 3.5x better geekbench 3 single core score
Much better overclocked clock speed (Air) 4.76 GHz vs 2.56 GHz More than 85% better overclocked clock speed (Air)
More threads 12 vs 2 10 more threads
More cores 6 vs 2 Three times as many cores; run more applications at once
Newer Nov, 2011 vs Sep, 2005 Release date over 6 years later
Significantly better performance per watt 5.04 pt/W vs 0.75 pt/W Around 6.8x better performance per watt
Much better overclocked clock speed (Water) 4.58 GHz vs 2.4 GHz More than 90% 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
Much lower typical power consumption 77.19W vs 176.72W 2.3x lower typical power consumption
Much more l2 cache per core 1 MB/core vs 0.33 MB/core More than 3x more l2 cache per core
Much lower annual home energy cost 22.89 $/year vs 56.39 $/year 2.5x lower annual home energy cost
Much lower annual commercial energy cost 83.22 $/year vs 184.84 $/year 2.2x lower annual commercial energy cost

Benchmarks Real world tests of Core i7 3960X vs Opteron 880

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i7 3960X
18,528
Opteron 880
1,379

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 3960X
2,595,000 MB/s
Opteron 880
63,500 MB/s

Specifications Full list of technical specs

summary

Core i7 3960X  vs
Opteron 880 
Clock speed 3.3 GHz 2.4 GHz
Cores Hexa core Dual core
Socket type
LGA 2011
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 3960X  vs
Opteron 880 
Threads 12 2
L2 cache 2 MB 2 MB
L2 cache per core 0.33 MB/core 1 MB/core
Manufacture process 32 nm 90 nm
Max CPUs 1 8
Clock multiplier 33 12
Voltage range 0.6 - 1.35V 1 - UnknownV
Operating temperature Unknown - 66.8°C 0 - 67°C

overclocking

Overclocked clock speed 4.76 GHz 2.56 GHz
Overclocked clock speed (Water) 4.58 GHz 2.4 GHz
Overclocked clock speed (Air) 4.76 GHz 2.56 GHz

power consumption

TDP 130W 95W
Annual home energy cost 56.39 $/year 22.89 $/year
Annual commercial energy cost 184.84 $/year 83.22 $/year
Performance per watt 5.04 pt/W 0.75 pt/W
Typical power consumption 176.72W 77.19W
Intel Core i7 3960X
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AMD Opteron 880
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