The Inquirer about Power6
Interesting article about IBMs step back to “in order architectures”:
What do you get out of it performance wise? If you look at the specfp2006, Power5+ at 2.2GHz reached 14.9 specfp2006, while Power6 reaches 22.3 specfp2006 at 4.7GHz - but of course, in an adapted Power5 machine. In summary, just under half additional speed at well over twice the clock.
The Power6 was something like the bogey man in the RISC world, but after all it´s a good evolution of their Power architecture. But´s by far not the “kill-all-other-proc” IBM and some analysts wanted to make us believe.