Back in March, Kanye West and Jay-Z peformed "H.A.M.," the first single from their forthcoming collaborative album Watch the Throne, for the first time ever at the Vevo-sponsored G.O.O.D. Music showcase at the SXSW festival in Austin, Texas. It's been a while since then, but professional quality of the performance is finally up on G.O.O.D.'s new Vevo page. Jay and Ye come hard in this clip, blasting through the Lex Luger-produced track with a level of raw aggression that isn't always on display in their regular work.