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Differences What are the advantages of each

Front view of Intel Atom x7 x7-Z8700

Reasons to consider the
Intel Atom x7 x7-Z8700

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Much better geekbench 3 AES single core score 389,000 MB/s vs 20,550 MB/s Around 19x better geekbench 3 AES single core score
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
Much newer manufacturing process 14 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better performance per dollar 4.22 pt/$ vs 0.5 pt/$ Around 8.5x better performance per dollar
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
Higher clock speed 1.6 GHz vs 1.33 GHz More than 20% higher clock speed
Newer Jan, 2015 vs Apr, 2008 Release date over 6 years later
More cores 4 vs 1 3 more cores; run more applications at once
Significantly better overclocked clock speed (Air) 2.4 GHz vs 1.6 GHz More than 50% better overclocked clock speed (Air)
Better PassMark score 1,924 vs 215 Around 9x better PassMark score
More threads 4 vs 2 Twice as many threads
Better overclocked clock speed (Water) 1.6 GHz vs 1.33 GHz More than 20% better overclocked clock speed (Water)
Front view of Intel Atom Z520

Reasons to consider the
Intel Atom Z520

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Much better 3DMark06 CPU score 391 vs 23.1 Around 17x better 3DMark06 CPU score
Supports dynamic frequency scaling Yes vs No Somewhat common; Allows for maximum performance when needed, while conserving power and minimizing heat production when not needed

Benchmarks Real world tests of Atom x7 x7-Z8700 vs Z520

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

Atom x7 x7-Z8700
389,000 MB/s
Atom Z520
20,550 MB/s

3D Mark 06 (CPU)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Atom x7 x7-Z8700  vs
Z520 
Clock speed 1.6 GHz 1.33 GHz
Cores Quad core Single core

features

Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
Supplemental SSE3
AES
Supports dynamic frequency scaling No Yes

power consumption

Typical power consumption N/A 1.63W

bus

Architecture FSB FSB
Number of links 1 1

details

Atom x7 x7-Z8700  vs
Z520 
Architecture x86-64 x86
Threads 4 2
L2 cache 2 MB 0.5 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 14 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.4 GHz 1.6 GHz
Overclocked clock speed (Water) 1.6 GHz 1.33 GHz
Overclocked clock speed (Air) 2.4 GHz 1.6 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics N/A
Number of displays supported 3 N/A
GPU clock speed 200 MHz N/A
Intel Atom x7 x7-Z8700
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Intel Atom Z520
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