How to tell if a video card is fried?

k so im building a computer, and i was scavenging throught my parents old one for parts, and came across an MSI Video Card. i dont know if it is working or not, but if i put it into my new motherboard(which also has an integrated video card, but i need two for dual monitors right?) is there a possibility that if it is fried it will break my motherboard if i try to put it on it? how can i tell if it is working or not witout risking my new motherboard?|||How old, and which model of video card.