i see, i thought you planned to upgrade to 12.04....
nvidia card should be ok (it not Optimus technology, right? i mean since you have no other card...). you could porbably even install their porprietary drivers. And if it's a laptop you might not be able to upgrade the card since often thse graphics chips are attached to motherboard.
otherwise the easiest way is to run a live system (select "try it") and then see if it all works and what additional drivers are available for install.
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