Pokial si dobre pamatam tak x86, x86_64, a 64 je rozdielx86 je 32 bit (P III, P 4...)x86_64 je 32 bit cpu z podporov 64 bit instrukcii (I7...)64 je plnohodnotny 64 bit cpu (itanium...)
Intended to push performance beyond existing designs, Itanium departed dramatically from Intel's legacy x86 and other architectures. The Itanium architecture is based on explicit instruction-level parallelism, in which decisions about which instructions to execute in parallel must be made by the compiler.
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