ATI Radeon HD 4870 X2 World’s Fastest Graphic Card was launched by AMD (ATI); comes with 2.4 teraFLOPS of processing power.   These cards comprise the ATI Radeon HD 4800 X2 series, combining two ATI Radeon HD 4800 series GPUs with a more advanced cross-GPU connection based on the PCIe 2.0 standard, plus two gigabytes of memory.