Can this computer run photoshop smoothly, and play cod on at least high graphics?

Yea of cousre, your just shoin off your specs huh ;) Well tip for you my friend, if you plan on installing a 32bit OS, those 8GB of ram you bought is just gonna have 5GB of wasted money. 32bit OSs only will use about 2.5-3.5GB of RAM to run things(other than the OS)