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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
Much higher clock speed 3 GHz vs 1.6 GHz More than 85% higher clock speed
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 1.66 GHz More than 2.5x better overclocked clock speed (Air)
Significantly better PassMark (Single core) score 1,251 vs 446 More than 2.8x better PassMark (Single core) score
Much better overclocked clock speed (Water) 4.23 GHz vs 1.65 GHz More than 2.5x better overclocked clock speed (Water)
Better PassMark score 2,160 vs 793 Around 2.8x better PassMark score
Front view of AMD G G-T56N

Reasons to consider the
AMD G G-T56N

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower typical power consumption 14.63W vs 52.81W 3.6x lower typical power consumption
Newer manufacturing process 40 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher Maximum operating temperature 90 °C vs 72.4 °C Around 25% higher Maximum operating temperature
Newer Jan, 2011 vs Jan, 2008 Release date over 3 years later
Much lower annual home energy cost 4.34 $/year vs 15.66 $/year 3.6x lower annual home energy cost
Much lower annual commercial energy cost 15.77 $/year vs 56.94 $/year 3.6x lower annual commercial energy cost
Better performance per watt 2.86 pt/W vs 1.83 pt/W More than 55% better performance per watt

Benchmarks Real world tests of Core2 Duo E8400 vs G G-T56N

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
G G-T56N
53,850 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
G G-T56N 
Clock speed 3 GHz 1.6 GHz
Cores Dual core Dual core

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
AMD64
SSE4.1
AMD-V
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 18W
Annual home energy cost 15.66 $/year 4.34 $/year
Annual commercial energy cost 56.94 $/year 15.77 $/year
Performance per watt 1.83 pt/W 2.86 pt/W
Typical power consumption 52.81W 14.63W

details

Core2 Duo E8400  vs
G G-T56N 
Threads 2 2
L2 cache 6 MB 1 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 40 nm
Max CPUs 1 1
Clock multiplier 9 8
Operating temperature Unknown - 72.4°C Unknown - 90°C

overclocking

Overclocked clock speed 4.22 GHz 1.66 GHz
Overclocked clock speed (Water) 4.23 GHz 1.65 GHz
Overclocked clock speed (Air) 4.22 GHz 1.66 GHz

integrated graphics

GPU None GPU
Label N/A AMD Radeon HD 6310HD 6320
GPU clock speed N/A 500 MHz
Intel Core2 Duo E8400
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AMD G G-T56N
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