AMD said it's bringing the new heat this week, but, in a classic act of showmanship, it's teasing out only imagery today and insisting on making us wait until Friday to truly learn what the next generation of Radeon graphics is made of. For now, we have the full titles of its leading lights, namely the Radeon HD 6870 and Radeon HD 6850, along with plenty of pictorial evidence of their existence in a lab somewhere. We note with glee that the default output