One year old Gateway FX 6860. Device Manager indicates Dicplay Adapter as ATI Radeon HD 5700 Series. However, while cleaning inside of computer, checked video card and it is a ATI Radeon HD 6750. Removed adapter and driver and rebooted but computer stills indicates a Radeon HD 5700 series. Does this really matter and if so, how do I get computer to recoginze the right card.