The number of places that run e.g. 4U $10,000 HP servers with 4 socket, 16 core Opteron servers is reasonably low I think.
http://www.newegg.com/Product/Product.aspx?Item=N82E16816101... http://www.newegg.com/Product/Product.aspx?Item=N82E16819113... http://www.newegg.com/Product/Product.aspx?Item=N82E16820239...