AMD ATI Radeon HD 4770 User's Guide download pdf (Page 23)

During software installation on a PC with the Windows Vista OS, the screen goes

blank

The software is still installing. Wait 20–30 minutes to make sure the software has

finished installing and then restart the computer.

Troubleshooting ATI CrossFireX

The following are suggested solutions for common ATI CrossFireX

troubleshooting issues.

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 ATI CrossFireX Web page at ati.amd.com/

crossfire.

Use Graphics Cards with Different Amounts of Memory

In some ATI CrossFireX configurations, graphics cards with different amounts of

memory can by used; however, restarting your computer is required after

enabling ATI CrossFireX. This will cause ATI 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 ATI 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.

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

ATI 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.

3D Client is Active

You will not be able to start ATI 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 ATI CrossFireX.

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AMD ATI Radeon HD 4770 User's Guide Page 23