that isn't enough information to help you out very well. this information could easily be solved also if you would use the search function (ya that nice box up in the top right corner). if your system only has 1 DVI/VGA output then it is most likely you can't run multiple monitors at the same time, even with a splitter. the only thing you could do to be able to run multiple monitors (2+) would be to buy a graphics card.

hope this helps some and again, pleas do some research before you post. ^_^

~YYF