Trouble building a pc

i am building a pc using a asus motherboard p4b533-e i downloaded the users manual and built it in accordance to that. i am not very literate with pc building so be warned. i have the pc built to the specs, it boots up i hear the HDD kick in but i cant tell if it works as the connection for my monitior does not fit the connection on the pc.... my idea to solve this was to put my AGP in and connect the monitor to that as it fits, PROBLEM the red led warning light stays off supposedly meaning it works but the monitor still says no signal input, i have been told to download the drivers for the AGP onto disk and that would work with the cd in, the problem is that i only know it is a nvidia AGP i dont know the model so how do i find this out?