CPUBoss Review Our evaluation of E8400 vs 2650 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

7.1

CPUBoss Score

Combination of all six facets

Winner
Intel Core2 Duo E8400 

CPUBoss recommends the Intel Core2 Duo E8400  based on its performance and 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 higher clock speed 3 GHz vs 1.4 GHz Around 2.2x higher clock speed
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 PassMark score 2,160 vs 915 More than 2.2x better PassMark score
Much better PassMark (Single core) score 1,251 vs 534 More than 2.2x better PassMark (Single core) score
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Front view of AMD Sempron 2650

Reasons to consider the
AMD Sempron 2650

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 28 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher Maximum operating temperature 95 °C vs 72.4 °C More than 30% higher Maximum operating temperature
Much lower typical power consumption 20.31W vs 52.81W 2.6x lower typical power consumption
Newer Dec, 2013 vs Jan, 2008 Release date over 6 years later
Much lower annual home energy cost 6.02 $/year vs 15.66 $/year 2.6x lower annual home energy cost
Much lower annual commercial energy cost 21.9 $/year vs 56.94 $/year 2.6x lower annual commercial energy cost

Benchmarks Real world tests of Core2 Duo E8400 vs Sempron 2650

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Core2 Duo E8400
2.41 mHash/s
Sempron 2650
13.81 mHash/s

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
Sempron 2650
732,100 MB/s

Cinebench R10 32-Bit

Cinebench R10 32-Bit (Single Core)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Sempron 2650 
Clock speed 3 GHz 1.4 GHz
Cores Dual core Dual core
Socket type
LGA 775
FS1b

features

Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
F16C
MMX
AVX
SSE3
SSE
AMD64
SSE4.1
SSE4.2
AMD-V
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 25W
Annual home energy cost 15.66 $/year 6.02 $/year
Annual commercial energy cost 56.94 $/year 21.9 $/year
Performance per watt 1.83 pt/W 9.03 pt/W
Typical power consumption 52.81W 20.31W

details

Core2 Duo E8400  vs
Sempron 2650 
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 28 nm
Max CPUs 1 1
Voltage range 0.85 - 1.36V 0.5 - 1.4V
Operating temperature Unknown - 72.4°C Unknown - 95°C

overclocking

Overclock popularity 125 0

integrated graphics

GPU None GPU
Label N/A Radeon HD 8240
Latest DirectX N/A 11.0
GPU clock speed N/A 128 MHz
Turbo clock speed N/A 400 MHz
Intel Core2 Duo E8400
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AMD Sempron 2650
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