FX-51 stole the 64-bit thunder yesterday, but AMD's Opteron has been around for a while now. I took a look at the server platform, using two monster servers from Armari, complete with 64-bit Linux performance using SuSE Linux Enterprise Server 8. Here's a snippet.
You need to evaluate Opteron in context to see its advantages and from the right point of view, it has no equal.
You may be able to put more power per 1U in a rack with Intel just now, but that's just 32-bit power. For the enterprise, you can see why Opteron has scored more than a few key OEM and design wins from major vendors.
Check it out in full, here.
Rys