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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 lower typical power consumption 52.81W vs 89.38W More than 40% lower typical power consumption
Significantly better overclocked clock speed (Air) 4.22 GHz vs 3.04 GHz Around 40% better overclocked clock speed (Air)
Better geekbench 3 single core score 1,625 vs 1,120 More than 45% better geekbench 3 single core score
Newer Jan, 2008 vs Mar, 2006 Release date over 1 years later
Higher Maximum operating temperature 72.4 °C vs 65 °C More than 10% higher Maximum operating temperature
Better performance per watt 1.83 pt/W vs 0.53 pt/W Around 3.5x better performance per watt
Much better overclocked clock speed (Water) 4.23 GHz vs 2.6 GHz Around 65% better overclocked clock speed (Water)
Much lower annual commercial energy cost 56.94 $/year vs 96.36 $/year More than 40% lower annual commercial energy cost
Much lower annual home energy cost 15.66 $/year vs 26.5 $/year More than 40% lower annual home energy cost
Front view of AMD Opteron 185

Reasons to consider the
AMD Opteron 185

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CPUBoss is not aware of any important advantages of the AMD Opteron 185 vs the Intel Core2 Duo E8400.

Benchmarks Real world tests of Core2 Duo E8400 vs Opteron 185

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 185
76.7 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Opteron 185 
Clock speed 3 GHz 2.6 GHz
Cores Dual core Dual core
Socket type
LGA 775
939

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 185 
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 1
Clock multiplier 9 13
Voltage range 0.85 - 1.36V 1.3 - UnknownV
Operating temperature Unknown - 72.4°C 0 - 65°C

overclocking

Overclocked clock speed 4.22 GHz 3.04 GHz
Overclocked clock speed (Water) 4.23 GHz 2.6 GHz
Overclocked clock speed (Air) 4.22 GHz 3.04 GHz

power consumption

TDP 65W 110W
Annual home energy cost 15.66 $/year 26.5 $/year
Annual commercial energy cost 56.94 $/year 96.36 $/year
Performance per watt 1.83 pt/W 0.53 pt/W
Typical power consumption 52.81W 89.38W
Intel Core2 Duo E8400
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AMD Opteron 185
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