• Adds a ray tracing hit token that can be used to optimize some ray tracing scenarios on RDNA2 hardware.
• Additional shader intrinsics, namely ReadLaneAt and float conversions.
• Detection for RDNA 2 hardware. It’s worth understanding that this should not be relied upon for detecting feature support like ray tracing or VRS. Its important to use the rendering API eg DirectX 12, to determine feature support as many features are a function of the hardware, OS and driver support.
• Detection of external GPUs.

• Clock speed reporting for APUs.
• Reinstating the sharedMemoryInBytes field in the AGSDeviceInfo structure which is used for calculating the memory budget for APUs.

• x86 libs.
• Visual Studio 2019 support.
• Support for base vertex and base instance intrinsics.
• Support for GetWaveSize intrinsics.
• Samples have been ported from premake to cmake.

• A better description of the GPU architecture for those wishing to fine tune their games for specific code paths. 
• The ability to check if the GPU is an APU or not.  This may be useful when budgeting for memory since the local memory reported will only be a small amount compared to the system memory the GPU has access to. 
• Shader intrinsics for getting the draw index for execute indirect calls as well as support for atomic U64 ops.
• Radeon™ 7 and RDNA GPU core and memory speeds are now returned.
• For those using the static lib version of AGS, you may be pleased to hear we now ship the debug versions of these libs too.

Version 5.3 adds DirectX® 11 deferred context support for our MultiDrawIndirect and UAV overlap extensions, along with a helper function to let your app determine if the installed driver meets your game’s minimum driver version requirements. If you’re a Vulkan® user, you can pair that with our machine readable AMD Vulkan versions database, to get more information about the Vulkan® implementation in our client driver.

Lastly, there’s a new FreeSync 2 gamma 2.2 mode. It uses a 10-bit (per RGB component, 2-bit alpha) swapchain, as opposed to the 16-bit (per RGB component, 16-bit alpha) swapchain needed for FreeSync 2 scRGB.

Version 5.2 adds support for app registration in DirectX 12. App registration lets you give more information about your game or application to our driver, which can then use that (ideally unique) information to better support the game or app if we need to make driver-side changes to help things run as efficiently and correctly as possible.

We also changed how you get access to extensions under DX12, requiring you to create your GPU device using agsDriverExtensionsDX12_CreateDevice() , instead of the normal D3D12CreateDevice() call you’d make to D3D.

Lastly, we’ve also added support for breadcrumb markers in D3D11. Using the agsDriverExtensionsDX11_WriteBreadcrumb() API, you can put in place a strategy for debugging driver issues more easily. Sometimes your game or app can interact with the driver in a way that causes it to crash or TDR. The new API gives you the ability to leave markers around your D3D11 API calls, helping you narrow down exactly what interaction with the driver caused the problem.

Version 5.1 is a partly developer-focused update to AGS 5. We’ve listened to feedback about how difficult it can be to integrate the binary AGS libs into your games, and while we can’t open the source code to AGS to allow you to integrate it from source, we canvassed developers to figure out what pre-built binaries would be most useful to provide. So we’ve now added builds of the AGS binary library that are linkable with Visual Studio projects built with /MT and /MD, used to select a particular CRT.

There’s also a breaking change in how you get access to DX11 AMD extensions. Look at the Changelog for details on that. We’ve also added an application registration extension for DX11 apps. That lets you tell the driver that your game can be considered in a uniquely indentifiable way, which is particularly helpful if you build on top of popular middleware like Unity or UE4 and make rendering changes.

There’s also support for FreeSync 2 HDR, DX12 application user markers for Radeon GPU Profiler, VS2017 versions of the shipping samples, and new wave-level shader intrinsics for both DX11 and DX12.