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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
Significantly higher clock speed 3 GHz vs 1.86 GHz More than 60% higher clock speed
Much better geekbench 2 (32-bit) score 2,826 vs 2,060 More than 35% better geekbench 2 (32-bit) score
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 1.87 GHz More than 2.2x better overclocked clock speed (Air)
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Better PassMark (Single core) score 1,251 vs 714 More than 75% better PassMark (Single core) score
Much better overclocked clock speed (Water) 4.23 GHz vs 1.87 GHz More than 2.2x better overclocked clock speed (Water)
Slightly better PassMark score 2,160 vs 1,152 Around 90% better PassMark score
Front view of Intel Celeron P4500

Reasons to consider the
Intel Celeron P4500

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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 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly lower typical power consumption 28.44W vs 52.81W More than 45% lower typical power consumption
Better performance per dollar 0.87 pt/$ vs 0.67 pt/$ More than 30% better performance per dollar
Newer Jan, 2010 vs Jan, 2008 Release date over 2 years later
Significantly lower annual home energy cost 8.43 $/year vs 15.66 $/year More than 45% lower annual home energy cost
Significantly lower annual commercial energy cost 30.66 $/year vs 56.94 $/year More than 45% lower annual commercial energy cost

Benchmarks Real world tests of Core2 Duo E8400 vs Celeron P4500

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Celeron P4500 
Clock speed 3 GHz 1.86 GHz
Cores Dual core Dual core
Socket type
LGA 775
rPGA 988A

features

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

power consumption

TDP 65W 35W
Annual home energy cost 15.66 $/year 8.43 $/year
Annual commercial energy cost 56.94 $/year 30.66 $/year
Performance per watt 1.83 pt/W 1.82 pt/W
Typical power consumption 52.81W 28.44W

details

Core2 Duo E8400  vs
Celeron P4500 
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 32 nm
Transistor count 410,000,000 382,000,000
Max CPUs 1 1
Clock multiplier 9 14

overclocking

Overclocked clock speed 4.22 GHz 1.87 GHz
Overclocked clock speed (Water) 4.23 GHz 1.87 GHz
Overclocked clock speed (Air) 4.22 GHz 1.87 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics
Number of displays supported N/A 2
GPU clock speed N/A 500 MHz
Turbo clock speed N/A 667 MHz

bus

Architecture FSB DMI
Number of links 1 1
Intel Core2 Duo E8400
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Intel Celeron P4500
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