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Microsoft SER Demo Shows Big Ray Tracing Gains Across GPUs

Microsoft released DirectX 12 Agility SDK 1.619, officially introducing Shader Model 6.9 and the DXR 1.2‑based Shader Execution Reordering (SER) feature. In a controlled demo, Intel’s Arc B‑Series GPUs achieved up to a 90 % performance boost when SER was enabled, while NVIDIA’s RTX 4090 and early Blackwell‑class chips showed 70‑80 % gains. SER works by reorganizing divergent ray workloads to improve SIMD utilization, addressing a key bottleneck in real‑time ray tracing. The true impact will depend on how game engines adopt SER in production titles.