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Differences What are the advantages of each

Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Much more l2 cache 6 MB vs 2 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l2 cache per core 3 MB/core vs 1 MB/core 3x more l2 cache per core
Higher clock speed 3 GHz vs 2.6 GHz More than 15% higher clock speed
Much better overclocked clock speed (Air) 4.22 GHz vs 2.75 GHz Around 55% better overclocked clock speed (Air)
Lower typical power consumption 52.81W vs 69.06W Around 25% lower typical power consumption
Better geekbench 3 single core score 1,625 vs 946 More than 70% better geekbench 3 single core score
Newer Jan, 2008 vs Mar, 2006 Release date over 1 years later
Much better overclocked clock speed (Water) 4.23 GHz vs 2.6 GHz Around 65% better overclocked clock speed (Water)
Higher Maximum operating temperature 72.4 °C vs 67 °C Around 10% higher Maximum operating temperature
Lower annual home energy cost 15.66 $/year vs 20.48 $/year Around 25% lower annual home energy cost
Lower annual commercial energy cost 56.94 $/year vs 74.46 $/year Around 25% lower annual commercial energy cost
Front view of AMD Opteron 885

Reasons to consider the
AMD Opteron 885

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Supports more CPUs in SMP configuration 8 vs 1 7 supports more CPUs in SMP configuration
Much better geekbench 3 Multi-Core score 6,967 vs 2,982 More than 2.2x better geekbench 3 Multi-Core score

Benchmarks Real world tests of Core2 Duo E8400 vs Opteron 885

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

Core2 Duo E8400
128,000 MB/s
Opteron 885
71,800 MB/s

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Opteron 885 
Clock speed 3 GHz 2.6 GHz
Cores Dual core Dual core
Socket type
LGA 775
940

features

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

details

Core2 Duo E8400  vs
Opteron 885 
Threads 2 2
L2 cache 6 MB 2 MB
L2 cache per core 3 MB/core 1 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 1 8
Clock multiplier 9 13
Voltage range 0.85 - 1.36V 1 - UnknownV
Operating temperature Unknown - 72.4°C 0 - 67°C

overclocking

Overclocked clock speed 4.22 GHz 2.75 GHz
Overclocked clock speed (Water) 4.23 GHz 2.6 GHz
Overclocked clock speed (Air) 4.22 GHz 2.75 GHz

power consumption

TDP 65W 85W
Annual home energy cost 15.66 $/year 20.48 $/year
Annual commercial energy cost 56.94 $/year 74.46 $/year
Performance per watt 1.83 pt/W 1.56 pt/W
Typical power consumption 52.81W 69.06W
Intel Core2 Duo E8400
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AMD Opteron 885
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