Manual
Page 30
... more Graphics Processing Units (GPUs). Configure When an ATI CrossFireX configuration is detected for the first time by dynamically and safely overclocking the graphics processor and memory. ATI Overdrive: Use Overdrive to obtain the ATI recommended speeds for the graphics processor clock and video memory clock.... Note: If your computer has full booted, disable Preserve ATI Overdrive settings at logon. GV-R6900 Series Graphics Accelerator - 30 - Use the Automated clock configuration utility to maximize your specific requirements.
... more Graphics Processing Units (GPUs). Configure When an ATI CrossFireX configuration is detected for the first time by dynamically and safely overclocking the graphics processor and memory. ATI Overdrive: Use Overdrive to obtain the ATI recommended speeds for the graphics processor clock and video memory clock.... Note: If your computer has full booted, disable Preserve ATI Overdrive settings at logon. GV-R6900 Series Graphics Accelerator - 30 - Use the Automated clock configuration utility to maximize your specific requirements.