I guess yeah now thinking about how the jumper functions that was a silly Q. But it was just that the HD3450 has only two DVIs and now VGA and I use 1 VGA and 1 DVI monitor. Thankfully the VGA monitor can take a digital signal via the VGA and a DVi to VGA adaptor.
so, problem solved a I guess. And sorry for asking a silly question. Cheers guys