Cray Inc. is building a supercomputer that consists of 24,000 2.6 Ghz quad-core Opteron (AMD) processors. This will be the first computer ever to hit ONE PFLOP – 1 quadrillion operations/second (the human brain is capable of about 10). It will use up to 400TB of memory and 11PB of storage.
A computer with 400 TERABYTES of Memory! (2008)