AMD Radeon HD 6750, User Manual

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4.3.2.1 Change Motherboard BIOS Settings
Some motherboards may have a system BIOS option to switch between single and dual
PCIe slot support. The default setting may be single slot support. Refer to the
motherboard’s manual for information to enable dual PCIe slot support.
For more information see the AMD CrossFireX Web page at
sites.amd.com/us/game/
technology/Pages/crossfirex.aspx .
4.3.2.2 Use Graphics Cards with Different Amounts of Memory
In some AMD CrossFireX configurations, graphics cards with different amounts of
memory can by used; however, restarting your computer is required after enabling
AMD CrossFireX. This will cause AMD CrossFireX to reduce the amount of memory
on the card with the most amount of memory to match the memory size of the graphics
card with the least amount of memory.
Clicking
OK to the memory mismatch error message will restart your computer.
Note: When disabling AMD CrossFireX you will be given the option to restart your
computer to restore the original graphics memory size or continue with the reduced
memory size.
4.3.2.3 Card Reversal Recommended
A recommendation message to reverse the graphics card positions may appear if the
primary graphics card is not installed into the primary PCIe slot. Although
AMD CrossFireX can be enabled, performance may be improved by reversing the
graphics cards in the computer.
See your motherboard's manual to determine which is the primary PCIe slot.
4.3.2.4 3D Client is Active
You will not be able to start AMD CrossFireX if a 3D application, game, or video
playback, such as a DVD movie, is running.
Close all open 3D applications, games, and movie player applications, and then enable
AMD CrossFireX.
4.3.2.5 AMD CrossFireX™ is Currently Unavailable
This error has occurred because AMD CrossFireX did not correctly detect your
graphics hardware or there is a problem with the software.
•
Check that the graphics cards are installed correctly.
•
Check that the interconnect cable, if applicable, is installed correctly.
• Close all running 3D applications.
•
Check that the AMD CrossFireX mode is set to Software in the Control Center
application. (The AMD Radeon HD 6750/6770 can only use AMD CrossFireX
technology in software mode.)
•
Reinstall the Control Center software application and drivers.
4.3.2.6 Screen Rotation is Unavailable or Does Not Work
Screen rotation is not an available feature on AMD CrossFireX systems.
Reference 21
© 2010 Advanced Micro Devices, Inc. AMD Radeon™ HD 6750/6770