Don't always believe what you see on youtube. There are a lot of punks out there that say they got this an that an show a video just to make you think man I can do that. Than you get all the parts an realize the loser was lying the entire time. Find a reputable source when viewing a video before deciding to follow their instructions.
Looking at the specs stated I'm surprised you can even open Crysis. Not trying to dog you because I have an APU as well an I can say from experience that they are decent at lower end games like Sims 3, Simcity 4, an stuff like that. Though when you step into the next tier say, Skyrim, Battlefield 4, etc you are going to need a GPU.
AMD + ASUS = Good Machine