AppliedMicro gives an overview of X-Gene, providing the different design components as well the various benefits in using X-Gene for compute server, storage and high performance computing. AppliedMicro is one of the initial partners with ARM in developing the ARMv8 64bit architecture, and customizing it for high performance server computing.
Also see Tour at AppliedMicro’s X-Gene Testing Lab
and AppliedMicro launching X-C1 Dev Board for 64bit Android development