Having produced the graphics chips that powered both the original Xbox and the PlayStation 3, it was a surprise to see NVIDIA's name left out of Sony's big PlayStation 4 reveal event last month. But there was AMD, picking up the empty spot left by NVIDIA, powering the PS4 with its 8-core "Jaguar" CPU and Radeon GPU. So, what happened? While we don't know the specifics of how AMD won the contract, NVIDIA's senior VP of content and tech Tony Tamasi tells GameSpot that his company, "Didn't want to do the business at the price those guys [Sony] were willing to pay." In so many words, Tamasi says NVIDIA weighed its options against other potential products the