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Why are 64-bit distros often called 'amd64'?

I am downloading an ISO image of Lubuntu; they have two versions: 32 and 64.

But why do they call the 64 version amd64 since they say that it works for Intel also?

1 Answer

Because AMD was the first one to release 64-bit x86 (x86-64) CPUs.

the AMD64 architecture was positioned by AMD from the beginning as an evolutionary way to add 64-bit computing capabilities to the existing x86 architecture, as opposed to Intel's approach of creating an entirely new 64-bit architecture with IA-64.

The first AMD64-based processor, the Opteron, was released in April 2003.

In fact, in the kernel the 64-bit support is called 'x86_64' to refer to the fact that both AMD and Intel (and others) implement those instructions.

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