Spokeshave, Re: a single poorly conducted overclocking attempt
You are correct that it was one attempt, but I don't know what makes you think it was poorly conducted, especially since the results were from an AMD fan site, who has every reason to show off the overclocking capabilities of Opteron.
Re: Considering that the memory and AGP were being run seriously out of spec, it is a tenuous conclusion at best that the cpu was the limiting factor in that overclock. The system almost certainly was limited by the memory.
If that's the case, then future systems will have the same limitation.