There are three IBM PowerPC-based processors, each clocked at 3.2GHz and capable of handling 2 hardware threads each. The processors are each armed with 1MB of L2 cache and within the Xbox, operate as symmetrical cores. What this means basically is that the Xbox 360 is capable of executing 6 hardware threads simultaneously. While the launch titles currently available will not require that much power, future titles certainly may. - viperlair.com