Intel EMT64 Xeon vs AMD Opteron

[O. Hartmann]

David O'Brien schrieb:

>[ Please don't cross post! ]
>
>On Fri, Feb 04, 2005 at 09:25:19PM -0700, Scott Long wrote:
>  
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>>Astrodog wrote:
>>>From what I understand, EM64T is essentally an extention to x86, so
>>    
>>
>>>it will understand the AMD64 instructions, much the same way an
>>>Athlon64 does. Opteron, once again, from what I've read on the topic
>>>is "Actual" 64-bit, not an emulated version.
>>>      
>>>
>..
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>>Both the AMD and Intel offering are just extensions to the ia32 design. 
>>Opteron is no more 'true' 64-bit than Nacona is.
>>    
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>
>Just as the i386 was just extensions to the 80286 design, which was just
>extensions to the original 8086 design. ;-)
>
>And just as the UltraSparc (Sparc v9) is just extensions to the 32-bit
>Sparc v8.
>
>Astrodog, I'm courous, what is the definition of a True 64-bit CPU?
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Maybe in honor the digital Alpha AXP?