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Differences What are the advantages of each

Front view of Intel Atom Z625

Reasons to consider the
Intel Atom Z625

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Much lower typical power consumption 1.79W vs 159W 89x lower typical power consumption
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower annual home energy cost 0.53 $/year vs 59.83 $/year 112.9x lower annual home energy cost
Much lower annual commercial energy cost 1.93 $/year vs 153.3 $/year 79.5x lower annual commercial energy cost
Newer May, 2010 vs Sep, 2009 Release date 7 months 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
Higher clock speed 2.6 GHz vs 1.9 GHz More than 35% higher clock speed
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much better overclocked clock speed (Air) 3.5 GHz vs 1.5 GHz More than 2.2x better overclocked clock speed (Air)
More cores 4 vs 1 3 more cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Significantly better overclocked clock speed (Water) 2.6 GHz vs 1.5 GHz Around 75% better overclocked clock speed (Water)

Features Key features of the Atom Z625  vs Athlon II X4 620 

clock speed

Atom Z625
1.9 GHz

L2 cache

overclocked clock speed (air)

Atom Z625
1.5 GHz

overclocked clock speed (water)

Atom Z625
1.5 GHz

Specifications Full list of technical specs

summary

Atom Z625  vs
Athlon II X4 620 
Clock speed 1.9 GHz 2.6 GHz
Cores Single core Quad core

features

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

power consumption

TDP 2.2W 95W
Annual home energy cost 0.53 $/year 59.83 $/year
Annual commercial energy cost 1.93 $/year 153.3 $/year
Typical power consumption 1.79W 159W

details

Atom Z625  vs
Athlon II X4 620 
Architecture x86 x86-64
Threads 2 4
L2 cache 0.5 MB 2 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 1.5 GHz 3.5 GHz
Overclocked clock speed (Water) 1.5 GHz 2.6 GHz
Overclocked clock speed (Air) 1.5 GHz 3.5 GHz

integrated graphics

GPU GPU None
Label Integrated N/A
GPU clock speed 400 MHz N/A

bus

Clock speed 400 MHz 2,000 MHz
Intel Atom Z625
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AMD Athlon II X4 620
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