Multiple VGA ports

I am building a computer. The mother board I am buying has amazing on board graphics, and I didnt believe it but I called the people and they said it would be fine as long as I am not doing intense gaming, which I am not.

My question is, if I buy a PCI card that has dual VGA connections will that cancel out my onboard?
I want to have multiple monitors but I want to keep my on board because I dont want to spend a ****ing fortune on a video card.

Here is my mobo:
[url=[http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4410107&CatId=1533][/url]

Here is the VGA card I want:
[url=[http://www.geeks.com/details.asp?invtid=MD-AT7000&cat=VCD][/url]


As you can see, the mob has a hybrid SLI slot, but im not sure if that only works with cards that are better than the onboard.

Hybrid SLI Requirements

Hybrid SLI-enabled motherboard and discrete GPUs (go to www.nvidia.com/hybridSLI for a full list.)

HybridPower-enabled power supply (go to www.nvidia.com/hybridSLI for a full list.)
Pretty sure a standard power supply would work.

Windows Vista operating system

At least 2GB of system memory

Latest NVIDIA Graphics Driver from www.nvidia.com

Systems BIOS programmed to enable Hybrid SLI

http://www.nvidia.com/content/hsli [...] _Guide.pdf