Q: What AMD Radeon™ GPUs or AMD APUs will be compatible with DirectX® 12?
A: When paired with a DirectX® 12-ready graphics driver, the following GPUs will be compatible with DirectX® 12: AMD Radeon™ HD 7000 series, HD 7000M series, HD 8000 series, HD 8000M series, R9 series and R7 series. AMD A-series APUs based on the Graphics Core Next architecture will also be compatible with DirectX® 12 when paired with a DirectX® 12-ready graphics driver.
Q: Which AMD products are supported in the Windows® 10 technical preview?
A: All AMD processors are compatible with the Windows® 10 technical preview. In addition, all DirectX® 9-compatible (or higher) accelerated processing units and AMD Radeon™ graphics cards are supported in the Windows® 10 technical preview. Specific legacy products (e.g., AMD Radeon™ HD 4000 series) may require use of drivers provided by Microsoft® through Windows Update with their Windows® 10 installation.
Q: Which graphics driver should I use for my AMD Radeon™ GPU or AMD APU?
A: Microsoft has indicated that updated device drivers are not required at this time, as existing device drivers are compatible with the Windows® 10 technical preview. AMD Radeon™ graphics and accelerated processing unit customers should use the latest available drivers from Windows Update until official Windows 10 driver support is posted on amd.com at a later date.
In other words, for the Preview version of Windows 10, you should use the drivers furnished by Microsoft for that version of the Preview. The Microsoft drivers do not have the full functionality that a AMD driver gives. When Windows 10 is finalized and released to the public, AMD will have the drivers for it.
And...Microsoft did not say "Your drivers are not compatible".
AMD Radeon™ graphics and accelerated processing unit customers should use the latest available drivers from Windows Update until official Windows 10 driver support is posted on amd.com at a later date.
Source: community.amd.com/thread/181015
