一主機兩芒

1. 一主機可用兩芒 - YES.. it depend on the display card NOT 底板.
2. 操作上是怎樣的 - Nothing.. if your display card support, after you install 2md Monitor, go to the display panel setting, set the 2nd Monitor output.
3. 如何switch - normally, there have TWO setting, one is split the display to TWO monitors, or you can use BOTH monito space.. such as, you can open IE and use Mouse move to 2nd Monitor, and open another application display on 1st Monitor.
4. 是否同時用兩個windows user a/c . - This is a question, base on above, you cannot do that. if you want, you have to BUY one accessories to do that... as I remember that, Magic-Pro have such product in the market, you can find. This solution is.. you only need ONE computer can for TWO or more user to use. You can say the COST.