HPC (High performance computing) and cloud computing center in the present structure are in desperate need to reach the maximal performance, while by the application of virtualization on high density servers can better cater to all demands only with one single machine. Furthermore, in the fields such as life sciences, engineering analysis, molecular dynamics, medical diagnosis, electronic design automation, financial analysis, fluid mechanics, geological sciences, and graphic processing, etc., greater demands on floating-point operation are submitted; applications such as streaming media processing, computer aid design, render farm and so on, are all demanding more floating-point operation, greater memory capacity and storage, where GPU accelerated computing is emerging.