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Differences What are the advantages of each

Front view of Intel Core i3 2100

Reasons to consider the
Intel Core i3 2100

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Much newer manufacturing process 32 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better geekbench 2 (32-bit) score 4,738 vs 2,081 More than 2.2x better geekbench 2 (32-bit) score
More threads 4 vs 2 Twice as many threads
Much better performance per watt 1.41 pt/W vs 0.69 pt/W More than 2x better performance per watt
Higher clock speed 3.1 GHz vs 3 GHz Around 5% higher clock speed
Front view of AMD Athlon 64 X2 5800+

Reasons to consider the
AMD Athlon 64 X2 5800+

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Much more l2 cache 1 MB vs 0.5 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower typical power consumption 72.31W vs 98.28W More than 25% lower typical power consumption
Much lower annual home energy cost 21.44 $/year vs 37.88 $/year Around 45% lower annual home energy cost
Lower annual commercial energy cost 77.96 $/year vs 93.47 $/year More than 15% lower annual commercial energy cost
Better overclocked clock speed (Water) 3.38 GHz vs 3.23 GHz Around 5% better overclocked clock speed (Water)

Benchmarks Real world tests of Core i3 2100 vs Athlon 64 X2 5800+

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

Core i3 2100
153,100 MB/s
Athlon 64 X2 5800+
80.1 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i3 2100  vs
Athlon 64 X2 5800+ 
Clock speed 3.1 GHz 3 GHz
Cores Dual core Dual core
Socket type
LGA 1155
AM2

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

details

Core i3 2100  vs
Athlon 64 X2 5800+ 
Threads 4 2
L2 cache 0.5 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 32 nm 65 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.23 GHz 3.25 GHz
Overclocked clock speed (Water) 3.23 GHz 3.38 GHz
PassMark (Overclocked) 1,518.9 1,554.5
Overclocked clock speed (Air) 3.23 GHz 3.25 GHz

power consumption

TDP 65W 89W
Annual home energy cost 37.88 $/year 21.44 $/year
Annual commercial energy cost 93.47 $/year 77.96 $/year
Performance per watt 1.41 pt/W 0.69 pt/W
Typical power consumption 98.28W 72.31W
Intel Core i3 2100
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AMD Athlon 64 X2 5800+
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