# NVIDIA RTX Path Tracing 1.9.0 Boosts Performance October 26, 2026 at 08:15 PM > NVIDIA releases RTXPT 1.9.0 on GitHub, delivering a 20% performance increase and adding support for Windows on ARM64 and CMake 4.1. **NVIDIA** has released version 1.9.0 of **RTX Path Tracing** (RTXPT) on **GitHub**, introducing significant performance gains for the open-source reference path tracer. The company claims this update delivers roughly 20% better performance compared to version 1.8.1. The update adds **Windows on ARM64** support and moves TLAS instance generation to the GPU on **DirectX 12**. Developers can now utilize NEE-AT light sampling for up to 2 million lights, while the SHaRC radiance cache is now enabled by default in real-time mode. This release serves as a vital code sample for developers, offering new flexibility to trace three quarters, half, or a quarter of pixels per frame. To implement these latest optimizations and scaling features, RTXPT version 1.9.0 now requires CMake 4.1. [#Nvidia]() #RTXPT #PathTracing #GraphicsDev [#RayTracing]() ## Related news ## [RTX 5080 Prices Surge Past $2,300 Amid Shortage]() October 28, 2026 at 10:11 AM ## [NVIDIA Releases Hotfix Driver for RTX 50 Series]() October 28, 2026 at 09:56 AM ## [Nvidia and PreussenElektra to Study AI Sites]() October 27, 2026 at 06:37 PM ## [NVIDIA Denies GeForce RTX 5090 Discontinuation]() October 26, 2026 at 05:01 PM ## [NVIDIA Updates Vera Rubin System Specifications]() October 26, 2026 at 09:30 AM