This has been an extremely common question over the last decade or so.
The simple answer is no. Installing a discrete graphics card automatically disables onboard video on most mobos. There are a few mobos that allow you to re-enable onboard graphics in the BIOS, but from what I've seen by other posts, you simply get a message before Windows starts loading that a discrete card was detected and you're totally SOL.
You'll need another video card.