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Differences What are the advantages of each

Front view of Intel Pentium G2120

Reasons to consider the
Intel Pentium G2120

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Much higher clock speed 3.1 GHz vs 1.33 GHz More than 2.2x higher clock speed
Much newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
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 better overclocked clock speed (Air) 3.21 GHz vs 1.33 GHz Around 2.5x better overclocked clock speed (Air)
Newer Sep, 2012 vs Mar, 2009 Release date over 3 years later
More cores 2 vs 1 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 3.1 GHz vs 1.33 GHz More than 2.2x better overclocked clock speed (Water)
Front view of Intel Atom Z520PT

Reasons to consider the
Intel Atom Z520PT

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Much lower typical power consumption 1.79W vs 44.69W 25x lower typical power consumption
Much lower annual home energy cost 0.53 $/year vs 13.25 $/year 25x lower annual home energy cost
Much lower annual commercial energy cost 1.93 $/year vs 48.18 $/year 25x lower annual commercial energy cost

Features Key features of the Pentium G2120  vs Atom Z520PT 

clock speed

Pentium G2120
3.1 GHz
Atom Z520PT
1.33 GHz

L2 cache

overclocked clock speed (air)

Pentium G2120
3.21 GHz
Atom Z520PT
1.33 GHz

overclocked clock speed (water)

Pentium G2120
3.1 GHz
Atom Z520PT
1.33 GHz

TDP

Specifications Full list of technical specs

summary

Pentium G2120  vs
Atom Z520PT 
Clock speed 3.1 GHz 1.33 GHz
Cores Dual core Single core
Socket type
LGA 1155
437

features

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

power consumption

TDP 55W 2.2W
Annual home energy cost 13.25 $/year 0.53 $/year
Annual commercial energy cost 48.18 $/year 1.93 $/year
Typical power consumption 44.69W 1.79W

details

Pentium G2120  vs
Atom Z520PT 
Architecture x86-64 x86
Threads 2 2
L2 cache 1 MB 0.5 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 22 nm 45 nm
Max CPUs 1 1
Clock multiplier 31 10

overclocking

Overclocked clock speed 3.21 GHz 1.33 GHz
Overclocked clock speed (Water) 3.1 GHz 1.33 GHz
Overclocked clock speed (Air) 3.21 GHz 1.33 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics N/A
Number of displays supported 3 N/A
GPU clock speed 650 MHz N/A
Turbo clock speed 1,050 MHz N/A

bus

Architecture DMI FSB
Number of links 1 1
Intel Pentium G2120
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Intel Atom Z520PT
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