I Just installed a Sapphire Radeon HD 5870 1gb OC edition and I can't for the life of me get Catalyst installed.
Device manage shows the 5870 there with the error symbol and Catalyst installed fine.
On reboot I get an error in windows saying:
"No AMD Graphics driver installed, or the AMD driver is not functioning properly. Please install the AMD driver appropriate for your AMD hardware."
Will Catalyst 12.11 not work with it? It's what the Sapphire website gives me to download.