CPUBoss Review Our evaluation of E8400 vs 565 among desktop 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

Fire Strike

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?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

No winner declared

Too close to call

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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 1 MB 6x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better performance per watt 1.83 pt/W vs 1.12 pt/W Around 65% better performance per watt
Much lower typical power consumption 52.81W vs 109.72W 2.1x lower typical power consumption
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Much lower annual home energy cost 15.66 $/year vs 39.31 $/year 2.5x lower annual home energy cost
Higher Maximum operating temperature 72.4 °C vs 70 °C Around 5% higher Maximum operating temperature
Much lower annual commercial energy cost 56.94 $/year vs 108.62 $/year Around 50% lower annual commercial energy cost
Much better overclocked clock speed (Water) 4.23 GHz vs 3.4 GHz Around 25% better overclocked clock speed (Water)
Better overclocked clock speed (Air) 4.22 GHz vs 4.16 GHz Almost the same
Front view of AMD Phenom II X2 565

Reasons to consider the
AMD Phenom II X2 565

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Significantly higher clock speed 3.4 GHz vs 3 GHz Around 15% higher clock speed
Newer Dec, 2010 vs Jan, 2008 Release date over 2 years later

Benchmarks Real world tests of Core2 Duo E8400 vs Phenom II X2 565

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 565
145,350 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

Cinebench R11.5

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Phenom II X2 565 
Clock speed 3 GHz 3.4 GHz
Cores Dual core Dual core
Socket type
LGA 775
AM3

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 80W
Annual home energy cost 15.66 $/year 39.31 $/year
Annual commercial energy cost 56.94 $/year 108.62 $/year
Performance per watt 1.83 pt/W 1.12 pt/W
Typical power consumption 52.81W 109.72W

details

Core2 Duo E8400  vs
Phenom II X2 565 
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 4.16 GHz
Overclocked clock speed (Water) 4.23 GHz 3.4 GHz
Overclocked clock speed (Air) 4.22 GHz 4.16 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 2,000 MHz
Intel Core2 Duo E8400
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AMD Phenom II X2 565
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