In the Full Rack version of Oracle SuperCluster T5-8, each SPARC T5-8 server has four processor modules (PM0 through PM3), with two sockets or PCIe root complex pairs on each processor module, for a total of eight sockets or PCIe root complexes for each SPARC T5-8 server. You can therefore have from one to eight logical domains on each SPARC T5-8 server in a Full Rack.