AMD's new FirePro S9300 X2 is its latest monster GPU

AMD is releasing one monster graphics card after another as its GPU speed battle with Nvidia heats up.The company's FirePro S9300 X2, announced Thursday, is AMD's second-fastest graphics card to date. The product is targeted at servers and supercomputers, where GPUs are used to speed up visual and scientific applications.The new FirePro delivers a maximum single-precision performance of 13.9 teraflops. That's shy of the 16 teraflop performance provided by the recently announced Radeon Pro Duo, a