The GPU PerfStudio DX12 plugin has been replaced by the DX12 server plugin in the CodeXL open source project.
The public release of the DX12 plugin can be found within the CodeXL project at: CodeXL
Introducing the Radeon™ Developer Tool Suite
The Radeon™ Developer Tool Suite combines our Radeon™ GPU Profiler, Radeon™ Memory Visualizer, Radeon™ GPU Analyzer, and Radeon™ Developer Panel in one handy package.