"Somewhere around mid-morning this past Friday, a rather large package made its way into the depths of Damage Labs. Inside was a server containing something very special: a pair of AMD's new quad-core Opteron processors. The chip code-named "Barcelona" has been something of an enigma during its development, both because of questions about exactly when it would arrive and how it would perform when it did. After a long, hot weekend of non-stop testing, we have some answers to those questions. AMD is formally introducing its Barcelona-based Opteron 2300-series processors today, so the time is now. As for the performance, well, keep reading to see exactly how the new Opterons compare to Intel's quad-core Xeons."