no it would not be a good idea. 1. since your motherboard is the most crucial (essentially most crucial) part of your computer, it is best not to f___ with it. plus, onboard graphics are never good for hardcore gaming. i have the 3200 onboard graphics on my motherboard as well and have even pondered this question (you can view my post here:
http://www.computerforum.com/165247-ga-ma780g-ud3h-overclock.html). again, you don't want to mess around with your motherboard unless you REALLY know what you are doing.