The Sun SPARC Enterprise T5220 server is powered by up to eight cores and 64 threads in one processor, all in a compact 2RU footprint. It also packs free virtualization technology including Solaris 10 Containers and Logical Domains (LDoms) which give you up to 64 isolated servers in a single system. It's the most open platform in servers, the most space and power-efficient in its class, and it's got more virtualization potential than any other 2RU machine.