AMD tried to re-claim the performance leadership with the release of the 2600+ and 2400+ versions of its AthlonXP CPU. While AMD officials claimed that the new chips outperform other PC processors, ExtremeTech testing doesn’t give the AthlonXP a definitive edge. AMD also reworked its “model number” performance ratings to better represent performance, executives said. In other hardware news, Sun released a new, budget-minded Unix workstation on Tuesday, mamed Sun Blade 150. But as its influence grows in the Unix market, the market itself is dwindling, C|Net says.