We have a web application project wich will be created using ASP.NET 4.0, Entity Framework, and SQL Sever 2008 R2. To meet the needs, suppose a normal page of this application that has a query which it takes 10 miliseconds to response on a Core2 Quad @ 2.8GHz proccessor with 2x2GB of DDR3 Ram (EntityFramework overheads are considered). And we will have about 2000 concurrent user at peek times. So, what is the best recommended specifications (CPU/RAM/RAID/...) for the server which will be host this application? -- Or -- How can I calculate that?