Gigabyte GV-R485OC-1GH VGA Driver 8.542 for Vista Publisher's description
Gigabyte GV-R485OC-1GH VGA Driver 8.542 for Vista
Powered by Radeon HD 4850 GPU
Supports PCI Express 2.0
Microsoft DirectX 10.1 and OpenGL 2.1 support
Integrated with the industry's best 1GB GDDR3 memory and 256-bit memory interface
Supports CrossFireX and AvivoHD technology
Features dual DVI-I / D-sub / HDMI / HDCP
It is highly recommended to always use the most recent driver version available.
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Try to set a system restore point before installing a device driver. This will help if you installed a wrong driver. Problems can arise when your hardware device is too old or not supported any longer.