CPUBoss Review Our evaluation of E8400 vs 2427 among all CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

5.1

CPUBoss Score

Combination of all six facets

Winner
Intel Core2 Duo E8400 

CPUBoss recommends the Intel Core2 Duo E8400  based on its single-core performance.

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VS

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 3 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly higher clock speed 3 GHz vs 2.2 GHz More than 35% higher clock speed
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Significantly better PassMark (Single core) score 1,251 vs 594 More than 2x better PassMark (Single core) score
Significantly better overclocked clock speed (Air) 4.22 GHz vs 3.2 GHz More than 30% better overclocked clock speed (Air)
Significantly higher Maximum operating temperature 72.4 °C vs 55 °C More than 30% higher Maximum operating temperature
Lower typical power consumption 52.81W vs 60.94W Around 15% lower typical power consumption
Much better overclocked clock speed (Water) 4.23 GHz vs 2.2 GHz More than 90% better overclocked clock speed (Water)
Lower annual commercial energy cost 56.94 $/year vs 65.7 $/year Around 15% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 18.07 $/year Around 15% lower annual home energy cost
Front view of AMD Opteron 2427

Reasons to consider the
AMD Opteron 2427

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Much better geekbench 3 Multi-Core score 8,531 vs 2,982 More than 2.8x better geekbench 3 Multi-Core score
More cores 6 vs 2 Three times as many cores; run more applications at once
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
More threads 6 vs 2 Three times as many threads
Newer Jun, 2009 vs Jan, 2008 Release date over 1 years later

Benchmarks Real world tests of Core2 Duo E8400 vs Opteron 2427

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 2427
94.2 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Opteron 2427 
Clock speed 3 GHz 2.2 GHz
Cores Dual core Hexa core
Socket type
LGA 775
F

features

Has a NX bit 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 75W
Annual home energy cost 15.66 $/year 18.07 $/year
Annual commercial energy cost 56.94 $/year 65.7 $/year
Performance per watt 1.83 pt/W 1.41 pt/W
Typical power consumption 52.81W 60.94W

details

Core2 Duo E8400  vs
Opteron 2427 
Threads 2 6
L2 cache 6 MB 3 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 2
Clock multiplier 9 11
Voltage range 0.85 - 1.36V 1 - UnknownV
Operating temperature Unknown - 72.4°C 0 - 55°C

overclocking

Overclocked clock speed 4.22 GHz 3.2 GHz
Overclocked clock speed (Water) 4.23 GHz 2.2 GHz
Overclocked clock speed (Air) 4.22 GHz 3.2 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

Architecture FSB HyperTransport 3.0
Clock speed 1,333 MHz 2,200 MHz
Intel Core2 Duo E8400
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AMD Opteron 2427
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