Gigabyte GV-R557D3-1GI Manual - Page 25

ATI Overdrive: Use Overdrive to maximize your viewing experience by dynamically and safely overclocking the graphics processor and memory. Use the Automated clock configuration utility to obtain the ATI recommended speeds for the graphics processor clock and video memory clock. Alternatively, manually set these speeds to meet your specific requirements. Finally, Overdrive can be configured to run when the computer is booted or only when running 3D applications. Note: If your computer cannot restart after setting a higher clock speed, press and hold the key during system start-up until you hear three beeps. Once your computer has full booted, disable Preserve ATI Overdrive settings at logon. CrossFireXTM: CrossFireX delivers exceptional performance on a single display by combining the processing power of two or more Graphics Processing Units (GPUs).  Configure When an ATI CrossFireX configuration is detected for the first time by the ATI Catalyst display driver, ATI CrossFireX support is automatically enabled. If ATI CrossFireX is not enabled, select the Enable CrossFireXTM check box.  Diagnostics Use this page to determine whether your ATI CrossFireX configurations are configured properly and functioning optimally. You can also use the page to view performance issues and suggested solutions specific to a particular configuration. Note: This page is only for ATI CrossFireX configuration. - 25 - Software Installation