So I recently built my first gaming pc, it's not ,uch but it works great! I currently have a MSI H81m-E33 motherboard and no graphics card. I want to play the new Tomb Raider on this computer but it LAGS so much! I figured it was because I have no graphics card, should I buy one? If so which ine or kind? Or should I get a new motherboard? One that is not a mini? Thank you!