I want to build my own pc and I'm not sure if I need to buy a sound card or not. I want true 7.1 surround sound for my Razer tiamat 7.1 headset. I'm looking to buy the Asus Z97-A as a motherboard and I'm not sure if there is true 7.1 surround sound on it (For games like Call of Duty, Watchdogs, Diablo 3 etc.).
Would I get a lot better sound quality if i bought a sound card? I'm want to spend around $70 if needed.