Directx Guru3d [verified] May 2026

By: DigitalDomi – Last updated: April 2026 Tested on: Win11 24H2, RTX 5090 / RX 9900 XT, DirectX 11 / 12 / Ultimate 🔍 1. First – Which DirectX version is your game using? Many modern games let you choose DX11 vs DX12 vs Vulkan.

| API | Best for | Typical issues | |------|----------|----------------| | | Older GPUs, high compatibility | CPU overhead, lower peak FPS | | DX12 | Modern GPUs (GTX 10xx / RX 400+) | Shader comp stutter, VRAM management | | DX12 Ultimate | RTX 20+ / RX 6000+ | Mesh shaders, sampler feedback bugs |