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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 1 MB 6x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Much better overclocked clock speed (Air) 4.22 GHz vs 3.72 GHz Around 15% better overclocked clock speed (Air)
Lower typical power consumption 52.81W vs 65W Around 20% lower typical power consumption
Higher Maximum operating temperature 72.4 °C vs 70 °C Around 5% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.23 GHz vs 3 GHz More than 40% better overclocked clock speed (Water)
Lower annual commercial energy cost 56.94 $/year vs 70.08 $/year Around 20% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 19.27 $/year Around 20% lower annual home energy cost
Front view of AMD Phenom II X2 B55

Reasons to consider the
AMD Phenom II X2 B55

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CPUBoss is not aware of any important advantages of the AMD Phenom II X2 B55 vs the Intel Core2 Duo E8400.

Benchmarks Real world tests of Core2 Duo E8400 vs Phenom II X2 B55

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
Phenom II X2 B55
134,050 MB/s

3D Mark 11 (Physics)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Phenom II X2 B55 
Clock speed 3 GHz 3 GHz
Cores Dual core Dual core
Socket type
LGA 775
AM3

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
SSE4.1
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 80W
Annual home energy cost 15.66 $/year 19.27 $/year
Annual commercial energy cost 56.94 $/year 70.08 $/year
Performance per watt 1.83 pt/W 2.01 pt/W
Typical power consumption 52.81W 65W

details

Core2 Duo E8400  vs
Phenom II X2 B55 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 6 MB 1 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1
Voltage range 0.85 - 1.36V 0.78 - 1.43V
Operating temperature Unknown - 72.4°C Unknown - 70°C

overclocking

Overclocked clock speed 4.22 GHz 3.72 GHz
Overclocked clock speed (Water) 4.23 GHz 3 GHz
Overclocked clock speed (Air) 4.22 GHz 3.72 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Clock speed 1,333 MHz 2,200 MHz
Intel Core2 Duo E8400
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AMD Phenom II X2 B55
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