1. Windows Vista 32/64 or XP 32/64(For Windows XP, please must install Catalyst 8.8 or later)
2. External ATi Radeon HD 2400/3400 series VGA card.

Please then proceed with the following instructions:

1. Install ATi Radeon HD 2400/3400 series VGA card on your motherboard and connect the monitor to onboard VGA.
2. Enter BIOS setup and make sure that both of below listed BIOS setting are changed : ( Please refer to user manual for the details)
   1. UMA Frame Buffer size ：256MB
   2. Init Display First：Onboard
3. After installing ATi Catalyst Driver (Catalyst includes VGA driver and control center) under Windows Vista, please enable CrossFire setting under ATi control center.