We really mean it: we have measured the PlayStation 3 processing RC5-72
work units at close to 170 Mkeys/sec, easily making this the fastest
hardware platform our client has been ported to. This is more than 22
times faster than a computer with a Pentium 4 processor running at the
same clock speed as the PS3's Cell processor.

http://n0cgi.distributed.net/cgi/dnet-finger.cgi?user=decio