Simple answer : You can use it. No probs.
Detail: There will be a custom resolution option in your nVidia control panel (your sig saus you have a 7300gt so i asume you might also have the nVidia control panel). Try the best possible custom resolution that suits you. After this you might need to adjust the dispaluy positioning. For this as well there is an option in the nVidia control panel.
Try it out.