Well sugar, that MB rules out an on-board video chipset! Did you install the latest drivers from NVidia, don't know if it will help.
Your video card is in fact a basic model, investing some money to get a more up-to-date one will be rewarding. You don't have to buy the very expensive ones, a GeForce 7600, 8500 or higher will make your PC perform so much better.
I'll be off-line the next hours (it's almost 8 o'clock in the morning here and I do need a bit of sleep!). But, I'll be back.

