SPARC64-VI

Build 74 of Nevada integrates support for 4-core SPARC64 CPU:

Solaris Nevada supports Jupiter CPU for OPL platform.
Jupiter CPU is a 4 core variant of the current shipping
Olympus-C CPU, which has 2 cores.  Both Olympus-C and
Jupiter has 2 CPU strands per CPU core.

Official name for Jupiter CPU is "SPARC64-VII".
Official name for current Olympus-C CPU is "SPARC64-VI".
Official name for OPL platform is "Sun SPARC Enterprise Mx000".