A server with two Quads effectively has 8 proccessors but Windows server only supports 4. Which 4 will it use and how is this defined. Are the remaining completely idle.

 

Years ago I worked for NCR and while on a training course I was working on what was then a big server with 16 processors all being used but on Windows NT3.5 Server. This was because the special HAL it used teamed 4 processors together so the O/S only saw one.