3D mark Just added one New DX12 Ultimate features To its test suite called sampler feedback. This is the fourth and final DirectX 12 Ultimate feature added to the 3DMark test suite along with DirectX ray tracing, grid coloring, and variable rate coloring.This new sampler feedback test allows you to visually see the performance optimizations that new features can provide in a 3D environment, and can be used as part of the 3DMark test suite $29.99 on Steam. If you currently own 3DMark, you should be able to use this new test for free.
Sampler feedback It is a new texture stream optimization introduced by Microsoft’s DirectX12 Ultimate API. This feature significantly optimizes the texture streaming technology by accurately predicting when texture details (mips) are used in the game, thereby reducing the overall demand for GPU memory. Texture streaming technology that does not use sampler feedback will have to guess what texture details (mips) will be needed in the future. This in turn will force the game to upload more texture data into GPU memory to ensure that the correct texture can be used when needed.
In a small demo created by Microsoft, Sampler Feedback was able to reduce memory usage from 524,288 KB to 51,584 KB. This is just a demonstration, but it shows how many advantages the sampler feedback can provide for reducing VRAM consumption. We bet that 8GB RTX 30 series GPUs will benefit to a large extent in the future.
Computer base I tested 3DMark’s sampler feedback test on RTX 3080 and RX 6800 XT, and found that there is a 5% performance difference between the on and off settings. For technologies that focus on improving memory usage rather than GPU performance, a small performance increase of 5% is not bad at all.
When you run the 3DMark sampler feedback test, you will be able to see how much performance improvement has been achieved in frame rate and frame time by turning the feature on and off, and you can intuitively understand how the technology works.
This test is not something that ordinary players may care about, but once sampler feedback becomes mainstream, it may be beneficial to technical reviewers and game developers.
Sampler feedback is just one of the benefits that DirectX 12 Ultimate can provide. If combined with other unique features (such as grid coloring and variable rate coloring), DX12 games may get some huge performance enhancements compared to games using the old API .