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Aug
11
comment What is the difference between i686 and x86_64?
@Brad got it right :) 64-bit (or in this case the _64 bit in x86_64) simply refers to an extension of the x86 instruction set. Its still the same assembly(-ish) however it adds new instructions for working on 64-bit integers etc. Hence why the x86 is still relevant. When people say x86, most of the time they really mean 32-bit as x86 is also applicable to 64-bit machines.
Aug
11
comment What is the difference between i686 and x86_64?
Its odd that you all fail to mention that 64-bit binaries are normally compiled with support for 64-bit assembly! In some cases, being able to utilize 64-bit operations can SIGNIFICANTLY increase the speed of an application. A notable one that comes to mind is Crypto (OpenSSL etc.). If your processor supports 64-bit its normally best to use 64-bit applications!
Jul
13
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