Here is a link to the officially supported AMD Windows 8 Consumer Preview driver:
AMD Catalyst Drivers Windows 8 Consumer Preview
It is only for these cards:
- AMD Radeon™ HD 6000 Series
- AMD Radeon HD 5000 Series
- AMD Radeon HD 7000M Series
- AMD Radeon HD 6000M Series
- AMD Mobility Radeon™ HD 5000 Series
- AMD A-Series APU
- AMD C-Series APU
- AMD E-Series APU
- AMD FirePro™ Series
- AMD FIrePro 3D Series
If you are like me and don't have one of those (I have AGP HD 3850 Turbo), you must edit the inf file and use the device manager to install. The problem here is that it is much more complicated than before because of missing revisions all throughout the inf.
I just hacked my way through it and got it to install very well on Windows x86 32 bit. I can easily do so too for x64, but then driver signing will have to be disabled permanently or at system boot each time.
If you would like me to create a custom .inf for your card not included on the list above (I can likely do mobile too as I have done in the past), please make a post with your hardware id for your specific card. Also, download the driver above and extract it to a folder so you have it ready.
Please also specify if you would like the AMD External service installed with the driver, or not - along with which you need between x86 or x64.