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Differences What are the advantages of each

Front view of Qualcomm Snapdragon S1 (QSD8250)

Reasons to consider the
Qualcomm Snapdragon S1 (QSD8250)

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Front view of Intel Core i7 820QM

Reasons to consider the
Intel Core i7 820QM

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Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher clock speed 1.73 GHz vs 1 GHz Around 75% higher clock speed
More advanced architecture x86-64 vs ARM A 64-bit architecture allows more RAM to be installed and accessed by the processor
Much better overclocked clock speed (Air) 2.71 GHz vs 1.11 GHz Around 2.5x better overclocked clock speed (Air)
More threads 8 vs 1 7 more threads
More cores 4 vs 1 3 more cores; run more applications at once
Newer Sep, 2009 vs Oct, 2008 Release date 11 months later
Better overclocked clock speed (Water) 1.73 GHz vs 1 GHz Around 75% better overclocked clock speed (Water)

Benchmarks Real world tests of Snapdragon S1 (QSD8250) vs Core i7 820QM

Specifications Full list of technical specs

summary

Snapdragon S1 (QSD8250)  vs
Core i7 820QM 
Clock speed 1 GHz 1.73 GHz
Cores Single core Quad core

overclocking

Overclocked clock speed 1.11 GHz 2.71 GHz
Overclocked clock speed (Water) 1 GHz 1.73 GHz
Overclocked clock speed (Air) 1.11 GHz 2.71 GHz

power consumption

Typical power consumption N/A 36.56W

details

Snapdragon S1 (QSD8250)  vs
Core i7 820QM 
Architecture ARM x86-64
Threads 1 8
Manufacture process 65 nm 45 nm

integrated graphics

GPU GPU None
Label Adreno 200 N/A
Qualcomm Snapdragon S1 (QSD8250)
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Intel Core i7 820QM
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