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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 more l3 cache 3 MB vs 0.5 MB 6x more l3 cache; more data can be stored in the l3 cache for quick access later
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Significantly higher clock speed 3.1 GHz vs 2.6 GHz Around 20% higher clock speed
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better performance per watt 1.41 pt/W vs 0.73 pt/W Around 95% better performance per watt
Much more l3 cache per core 1.5 MB/core vs 0.13 MB/core 12x more l3 cache per core
Much lower typical power consumption 98.28W vs 159W Around 40% lower typical power consumption
Much lower annual home energy cost 37.88 $/year vs 59.83 $/year More than 35% lower annual home energy cost
Much lower annual commercial energy cost 93.47 $/year vs 153.3 $/year Around 40% lower annual commercial energy cost
Much better overclocked clock speed (Water) 3.23 GHz vs 2.6 GHz Around 25% better overclocked clock speed (Water)
Newer Jan, 2011 vs Sep, 2009 Release date over 1 years later
Front view of AMD Athlon II X4 620

Reasons to consider the
AMD Athlon II X4 620

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Much more l2 cache 2 MB vs 0.5 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 4 vs 2 Twice as many cores; run more applications at once
Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Significantly better overclocked clock speed (Air) 3.5 GHz vs 3.23 GHz Around 10% better overclocked clock speed (Air)
Higher Maximum operating temperature 71 °C vs 69.1 °C Around 5% higher Maximum operating temperature

Benchmarks Real world tests of Core i3 2100 vs Athlon II X4 620

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 II X4 620
104,500 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Reviews Word on the street

Specifications Full list of technical specs

summary

Core i3 2100  vs
Athlon II X4 620 
Clock speed 3.1 GHz 2.6 GHz
Cores Dual core Quad core
Socket type
LGA 1155
AM3
Is unlocked No No

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 37.88 $/year 59.83 $/year
Annual commercial energy cost 93.47 $/year 153.3 $/year
Performance per watt 1.41 pt/W 0.73 pt/W
Idle power consumption 73W 111W
Peak power consumption 106.7W 175W
Typical power consumption 98.28W 159W

details

Core i3 2100  vs
Athlon II X4 620 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 0.5 MB 2 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 3 MB 0.5 MB
L3 cache per core 1.5 MB/core 0.13 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 1
Operating temperature Unknown - 69.1°C Unknown - 71°C

overclocking

Overclock popularity 101 10
Overclocked clock speed 3.23 GHz 3.5 GHz
Overclocked clock speed (Water) 3.23 GHz 2.6 GHz
Overclocked clock speed (Air) 3.23 GHz 3.5 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 2000 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 2100
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AMD Athlon II X4 620
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