The SPARC64 VI processor consists of two SPARC V9 cores with two vertical threads per core. It's built with an advanced 90nm Cu 10-layer process technology for high speed and density. And what's more the SPARC64 VI processor is 100% binary compatible with the UltraSPARC processors - so there is no need to recompile.The SPARC64 VI processor is designed with vertical multithreading (VMT) technology. This is a coarse-grained multithreaded technology that enables the multithreaded control instructions to suspend idle threads so that the active threads can use any unused resources.