AMD Radeon HD 7750, User Manual

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7.1.1.5 The computer boots up but there is no display.
Verify that the monitor is connected properly to the computer and a power supply.
If a DisplayPort adapter, passive dongle, or active dongle is used, visit
www.amd.com/
eyefinity and make sure it appears on AMD's listing of AMD Eyefinity Multi-Display
Ready or AMD Eyefinity Multi-Display Verified adapters/dongles.
If your motherboard has on-board graphics capabilities, you may need to disable
them. Consult your motherboard documentation for more information.
Note: Some manufacturers do not allow the on-board graphics to be disabled or to
become the secondary display.
7.1.1.6 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.
7.1.2 Troubleshooting AMD CrossFire™
The following are suggested solutions for common AMD CrossFire™ troubleshooting
issues.
7.1.2.1 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 CrossFire Web page at
sites.amd.com/us/game/
technology/Pages/crossfirex.aspx .
7.1.2.2 Use Graphics Cards with Different Amounts of Memory
In some AMD CrossFire configurations, graphics cards with different amounts of
memory can by used; however, restarting your computer is required after enabling
AMD CrossFire. This will cause AMD CrossFire 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 CrossFire you will be given the option to restart your
computer to restore the original graphics memory size or continue with the reduced
memory size.
7.1.2.3 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 CrossFire 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.
26 Reference
AMD Radeon™ HD 7750/7770 Graphics © 2012 Advanced Micro Devices, Inc.