Starting with the Solaris 10 10/08 release, the Solaris 64-bit operating system supports up to 256 processors on the x86 platform. Previous releases of the Solaris OS supported only up to 64 processors on x86 platforms in the 64-bit mode.
Support for 256 processors provides users the following benefits:
Users can use this release of Solaris on their existing x86 systems with up to 256 processors.
Users need not upgrade their OS when they upgrade to machines with over 64 processors in the future.
Users using this release of Solaris will be able to retain their entire software stack including the operating system, when they purchase larger machines.