Dell representatives attempted to give the independent estimation of AMD barcelona processors speed before the official announcement . From its commentaries it became clear that Barcelona will be faster than Xeon in floating-point calculations, and it can lag in integral calculations. Now when barcelona processors was presented officially this estimation was preserved .
The review of barcelone processor are not many we are working now on a new review. The reason for this modest information : no so many models , and reviewers had to coordinate with AMD not only in each step, but also in the text of finished review.
One of the review published was in the site anandtech, which used barcelona processors in desktop systems configuration . Average speed increase in comparison with K8 processors in the tasks with the intensive FPU use composed 15%. This is the strong side of barcelona processors , but in the tasks with the integral calculations weaknesses can appear. In comparison with K8 their is some increase but the values are modest .
penryn processors ensure speed increase in comparison with their predecessors by 5-10%. It is considered that according to intel need , this last will be able to increase penryn processors frequencies rapidly- in road map already figure dual core processors wolfdale with 3.4 GHz frequency .