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Differences What are the advantages of each

Front view of Intel Pentium G2020

Reasons to consider the
Intel Pentium G2020

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Much more l3 cache 3 MB vs 0 MB Compared to all cpus, 3 MB l3 cache is just OK
Much newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l3 cache per core 1.5 MB/core vs 0 MB/core Compared to all cpus, 1.5 MB/core l3 cache per core is just OK
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Front view of AMD Athlon II X2 255e

Reasons to consider the
AMD Athlon II X2 255e

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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
Higher clock speed 3.1 GHz vs 2.9 GHz More than 5% higher clock speed
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Lower typical power consumption 36.56W vs 44.69W Around 20% lower typical power consumption
Lower annual commercial energy cost 39.42 $/year vs 48.18 $/year Around 20% lower annual commercial energy cost
Lower annual home energy cost 10.84 $/year vs 13.25 $/year Around 20% lower annual home energy cost

Features Key features of the Pentium G2020  vs Athlon II X2 255e 

clock speed

L2 cache

Specifications Full list of technical specs

summary

Pentium G2020  vs
Athlon II X2 255e 
Clock speed 2.9 GHz 3.1 GHz
Cores Dual core Dual core

features

Has a NX bit Yes Yes
Has virtualization support Yes No
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

details

Pentium G2020  vs
Athlon II X2 255e 
Threads 2 2
L2 cache 1 MB 2 MB
L2 cache per core 0.5 MB/core 1 MB/core
L3 cache 3 MB 0 MB
L3 cache per core 1.5 MB/core 0 MB/core
Manufacture process 22 nm 45 nm
Max CPUs 1 1

power consumption

TDP 55W 45W
Annual home energy cost 13.25 $/year 10.84 $/year
Annual commercial energy cost 48.18 $/year 39.42 $/year
Typical power consumption 44.69W 36.56W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3
Intel Pentium G2020
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AMD Athlon II X2 255e
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