Unix Guardian: Sun Boosts Performance of UltraSparc-IV+ Chips
Good article about the speed bump for UltraSPARC IV+:
Server maker Sun Microsystems may be getting ready to launch the Advanced Product Line of Sparc clone servers with partner Fujitsu, but that doesn't mean innovation and process improvements were not under way for its own "Panther" UltraSparc-IV+ line of processors. And to that end, before the APL boxes come to market, Sun has announced faster Panther chips for customers who are running out of headroom.
I find this quite impressing: An architecture introduced 2001 is still capable to compete with modern architectures. And you can still use old boards in new systems, or new boards in old system. I don´t think that anybody has thought that Sun Fire would last that long at it´s invention.