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Differences What are the advantages of each

Front view of Apple A8X

Reasons to consider the
Apple A8X

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Much more l2 cache 2,048 MB vs 1 MB 2048x more l2 cache; more data can be stored in the l2 cache for quick access later
Higher clock speed 1.5 GHz vs 1.4 GHz More than 5% higher clock speed
Much better geekbench 3 Multi-Core score 4,552 vs 2,910 More than 55% better geekbench 3 Multi-Core score
Much more l2 cache per core 682.67 MB/core vs 0.5 MB/core More than 1365.2x more l2 cache per core
Better geekbench 3 AES single core score 1,050,000 MB/s vs 993,000 MB/s More than 5% better geekbench 3 AES single core score
Newer Oct, 2014 vs Sep, 2014 Release date 1 months later
Front view of Apple A8

Reasons to consider the
Apple A8

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Significantly better overclocked clock speed (Air) 2 GHz vs 1.38 GHz Around 45% better overclocked clock speed (Air)
Significantly better overclocked clock speed (Water) 2 GHz vs 1.38 GHz Around 45% better overclocked clock speed (Water)

Benchmarks Real world tests of Apple A8X vs A8

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Apple A8X
4,552
Apple A8
2,910

GeekBench 3 (Single core) Data courtesy Primate Labs

Apple A8X
1,818
Apple A8
1,623

GeekBench 3 (AES single core) Data courtesy Primate Labs

Apple A8X
1,050,000 MB/s
Apple A8
993,000 MB/s

GeekBench

Apple A8X
1,809
Apple A8
1,678

Specifications Full list of technical specs

summary

Apple A8X  vs
A8 
Clock speed 1.5 GHz 1.4 GHz
Cores Tri core Dual core
Is unlocked No No

overclocking

Overclocked clock speed 1.38 GHz 2 GHz
Overclocked clock speed (Water) 1.38 GHz 2 GHz
Overclocked clock speed (Air) 1.38 GHz 2 GHz

power consumption

TDP 4.5W 2.5W
Performance per watt 151.55 pt/W 250.07 pt/W
Typical power consumption 3.66W 2.03W

details

Apple A8X  vs
A8 
Threads 3 2
L2 cache 2,048 MB 1 MB
L2 cache per core 682.67 MB/core 0.5 MB/core
L3 cache 4,096 MB 4 MB
L3 cache per core 1,365.33 MB/core 2 MB/core
Manufacture process 20 nm 20 nm
Transistor count 3,000,000,000 2,000,000,000
Architecture ARM ARM

integrated graphics

GPU GPU GPU
Label PowerVR Series 6XT GXA6850 PowerVR Series 6XT GX6450
Apple A8X
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Apple A8
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