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Differences What are the advantages of each

Front view of Intel Core2 Duo E7400

Reasons to consider the
Intel Core2 Duo E7400

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Much more l2 cache 3 MB vs 0.5 MB 6x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 2.8 GHz vs 1.6 GHz Around 75% higher clock speed
Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better PassMark score 1,779 vs 398 Around 4.5x better PassMark score
Much better PassMark (Single core) score 1,147 vs 487 More than 2.2x better PassMark (Single core) score
Much better geekbench 2 (32-bit) score 2,543 vs 682 Around 3.8x better geekbench 2 (32-bit) score
Much better overclocked clock speed (Air) 3.91 GHz vs 2.36 GHz More than 65% better overclocked clock speed (Air)
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
More cores 2 vs 1 Twice as many cores; run more applications at once
More threads 2 vs 1 Twice as many threads
Much better performance per watt 1.52 pt/W vs 0.44 pt/W Around 3.5x better performance per watt
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much more l2 cache per core 1.5 MB/core vs 0.5 MB/core 3x more l2 cache per core
Much better overclocked clock speed (Water) 4.58 GHz vs 1.8 GHz More than 2.5x better overclocked clock speed (Water)
Significantly higher Maximum operating temperature 74.1 °C vs 70 °C More than 5% higher Maximum operating temperature
Newer Jan, 2008 vs Jul, 2004 Release date over 3 years later
Front view of AMD Sempron 2800+

Reasons to consider the
AMD Sempron 2800+

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Slightly lower typical power consumption 50.38W vs 52.81W Around 5% lower typical power consumption
Slightly lower annual commercial energy cost 54.31 $/year vs 56.94 $/year Around 5% lower annual commercial energy cost
Slightly lower annual home energy cost 14.94 $/year vs 15.66 $/year Around 5% lower annual home energy cost

Benchmarks Real world tests of Core2 Duo E7400 vs Sempron 2800+

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 E7400
119,000 MB/s
Sempron 2800+
43.2 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 E7400  vs
Sempron 2800+ 
Clock speed 2.8 GHz 1.6 GHz
Cores Dual core Single core
Socket type
LGA 775
754
AM2
462

features

Has a NX bit Yes Yes
Has virtualization support Yes No
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 62W
Annual home energy cost 15.66 $/year 14.94 $/year
Annual commercial energy cost 56.94 $/year 54.31 $/year
Performance per watt 1.52 pt/W 0.44 pt/W
Typical power consumption 52.81W 50.38W

details

Core2 Duo E7400  vs
Sempron 2800+ 
Architecture x86-64 x86
Threads 2 1
L2 cache 3 MB 0.5 MB
L2 cache per core 1.5 MB/core 0.5 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 1 1
Operating temperature Unknown - 74.1°C Unknown - 70°C

overclocking

Overclocked clock speed 3.91 GHz 2.36 GHz
Overclocked clock speed (Water) 4.58 GHz 1.8 GHz
Overclocked clock speed (Air) 3.91 GHz 2.36 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 1,066 MHz 200 MHz
Intel Core2 Duo E7400
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AMD Sempron 2800+
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