The Itanimum is targeted at a different market than the Opteron, and as such, costs several times more. And its competing with real server chips from other companies. The opteron is aimed at the same market as the Xeon chips, as I understand it. Its easy to see why the opteron would outsell the Itanimum in that case. I'd be more interested in seeing how the Opteron sells compared the the Xeon chips.