The new IBM PowerPC 970 is the heart of the PowerPC Blade. It is based on the 64-Bit Power 4 architecture which is also used in the processors of the IBM eServer pSeries. The 64-bit microprozessor · Offers full symmetrical multi-processing · Has a high reliability (with parity L1, ECC L2 and parity checked system bus) · Is manufactured in the latest 0,13 micrometer Copper/SOI CMOS technology · Runs at frequences ranging from 1.8 GHz - [b:85650a7315]2.5 Ghz[/b:85650a7315]
Therefore the IBMPowerPC 970 is the fastest PowerPC so far.
http://www-5.ibm.com/de/pressroom/cebit2003/en/highlights/powerpcblade.html