ATI had just dropped a bomb on the boys in green with the release of the HD 5870 that usurped the single GPU performance crown that nVidia has had a stranglehold on for the last few years and the company has now quickly followed up with the Juniper based HD 5770 and HD 5750 to fill a gap in the price/performance wars. The latest cards form Sapphire are DirectX 11 ready, support Windows 7 and are built on a 40nm fabrication process to both reduce costs and provide lower energy consumption. The HD 5770 features exactly half the stream processors (800), texture units (40) and ROPs(16) that its big brother, the HD 5870, carries into battle. The HD 5750 is built much the same way but the card itself has half the parts of the HD 5850. So just where will these cards fall when it comes time to start fraggin zombies or beginning the move to using your GPU as a computing tool? Based on the specifications, the HD 5770 and HD 5750 should offer up either half the performance of the HD 5870 and HD 5850, respectively. Let's hop to it and find out!