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Differences What are the advantages of each

Front view of Intel Core i3 2105

Reasons to consider the
Intel Core i3 2105

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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
Higher clock speed 3.1 GHz vs 2.8 GHz More than 10% higher clock speed
Much lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Significantly lower annual home energy cost 15.66 $/year vs 22.89 $/year More than 30% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 83.22 $/year More than 30% lower annual commercial energy cost
Newer Apr, 2011 vs Feb, 2009 Release date over 2 years later
Front view of AMD Phenom II X3 720

Reasons to consider the
AMD Phenom II X3 720

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Much more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
More cores 3 vs 2 1 more cores; run more applications at once
Much more l2 cache per core 0.67 MB/core vs 0.5 MB/core Around 35% more l2 cache per core
Much better overclocked clock speed (Air) 3.61 GHz vs 3.29 GHz Around 10% better overclocked clock speed (Air)
Significantly higher Maximum operating temperature 73 °C vs 69.1 °C More than 5% higher Maximum operating temperature
Much better overclocked clock speed (Water) 3.86 GHz vs 3.1 GHz Around 25% better overclocked clock speed (Water)

Benchmarks Real world tests of Core i3 2105 vs Phenom II X3 720

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 2105
150,600 MB/s
Phenom II X3 720
119,600 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i3 2105  vs
Phenom II X3 720 
Clock speed 3.1 GHz 2.8 GHz
Cores Dual core Tri core
Socket type
LGA 1155
AM3
Is unlocked No Yes

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 95W
Annual home energy cost 15.66 $/year 22.89 $/year
Annual commercial energy cost 56.94 $/year 83.22 $/year
Performance per watt 2.73 pt/W 1.38 pt/W
Typical power consumption 52.81W 77.19W

details

Core i3 2105  vs
Phenom II X3 720 
Architecture x86-64 x86-64
Threads 4 3
L2 cache 1 MB 2 MB
L2 cache per core 0.5 MB/core 0.67 MB/core
L3 cache 3 MB 6 MB
L3 cache per core 1.5 MB/core 2 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 1
Operating temperature Unknown - 69.1°C Unknown - 73°C

overclocking

Overclocked clock speed 3.29 GHz 3.61 GHz
Overclocked clock speed (Water) 3.1 GHz 3.86 GHz
Overclocked clock speed (Air) 3.29 GHz 3.61 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 3000 N/A
Number of displays supported 2 N/A
GPU clock speed 850 MHz N/A
Turbo clock speed 1,100 MHz N/A
Intel Core i3 2105
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AMD Phenom II X3 720
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