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Differences What are the advantages of each

Front view of Nvidia Tegra 3 (T30L)

Reasons to consider the
Nvidia Tegra 3 (T30L)

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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
More cores 4 vs 1 3 more cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Front view of Intel Atom Z2420

Reasons to consider the
Intel Atom Z2420

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Significantly newer manufacturing process 32 nm vs 40 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Newer Jan, 2013 vs Jan, 2012 Release date over a year later

Features Key features of the Tegra 3 (T30L)  vs Atom Z2420 

clock speed

Tegra 3 (T30L)
1.2 GHz
Atom Z2420
1.2 GHz

L2 cache

gpu clock speed

Tegra 3 (T30L)
416 MHz
Atom Z2420
400 MHz

Specifications Full list of technical specs

summary

Tegra 3 (T30L)  vs
Atom Z2420 
Clock speed 1.2 GHz 1.2 GHz
Cores Quad core Single core

integrated graphics

GPU GPU GPU
Label ULP GeForce Integrated
GPU clock speed 416 MHz 400 MHz

memory controller

Memory controller Built-in Built-in
Channels Single Channel Dual Channel

details

Tegra 3 (T30L)  vs
Atom Z2420 
Architecture ARM x86
Threads 4 2
L2 cache 1 MB 0.5 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 40 nm 32 nm

power consumption

Typical power consumption N/A N/A
Nvidia Tegra 3 (T30L)
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Intel Atom Z2420
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