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Hardware is a specific implementation of a computer architecture by following:
on a physical level by choosing adequate device and bus.
A line of processors may implement the same instruction set architecture and use nearly identical organizations but differs in hardware implementation. See example
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Example
Energy vs Performance
The Core i7 family provides two hardware model:
- one for desktop computers that is more powerful but consumes more energy,
- one for laptops that is less performant but more energy efficient