[CentOS] DVI + VGA?

I have an LCD monitor with both VGA and DVI connectors on it, and a
video card to match (both connectors).  If I want to switch from the
VGA (currently in use) to the DVI, do I need to do anything special
other than switch wires?  I didn't see anything in google that was
helpful (though I may not have used a smashing search...).

Thanks.

mhr