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GPU rendering and ray tracing with the RTX 2070 & 2080 - V-Ray, Redshift, Octane, LuxMark, Blender Cycles, OptiX Fermat & ProtoRay

How does the smallest RTX GPU perform in GPU rendering workloads - one of the best editon of the RTX 2070, the MSI RTX 2070 GAMING Z 8G is stacked up against its bigger brother and the top Maxwell and Pascal GPUs.

Test methodology

The card in question was used to drive the display - some applications gain performance when a card is a compute only device. All tests were executed three times (average of these runs are presented in all cases), the test was repeated in case of outlier results or anomalies.

V-Ray provide a free stand-alone application to evaluate how fast your hardware renders.

Redhsift offer a demo version of their fully fledged application, it is functionally identical to the commercial version, but renders with a watermark.

The Cycles render engine in Blender was assessed with the splash screen of v2.77 and v2.78. Render time is extracted so that it only covers pure path tracing time - no kernel compilation, scene loading, CPU-side BVH construction, final composition. Blender is launched headless (no GUI) with a python script responsible to get everything sorted and start the rendering process.

Octane and LuxMark provide neat benchmark tools, results are provided in Million samples per second. Octane additionally provides a score metric where 100 serves as a base score for a reference GTX 980.

Fermat is a high performance research oriented physically based rendering system - the project uses CUDA and the OptiX Prime intersection library to generate photorealistic images.

ProtoRay is an open source Embree benchmark suite that can be configured to use OptiX as a backend.

Hardware setup

PSU: Cooler Master 1000W VANGUARD

MOTHERBOARD: ASRock X470 Taichi

CPU: AMD Ryzen 7 2700X

GPU: MSI GTX 980Ti GAMING 6G

GPU: MSI GTX 1080 GAMING X+ 8G

GPU: MSI GTX 1080Ti GAMING X 11G

GPU: MSI RTX 2070 GAMING Z 8G

GPU: MSI RTX 2080 GAMING X TRIO

OS: Microsoft Windows 10 (10.0) Home 64-bit - Version 1809/RS5 (17763.55)

DRIVER: CUDA 10.0.132 - NV 416.81

RAM: G.Skill FlareX 16GB (2X8GB) DDR4 3200MHz

STORAGE: Samsung 960 EVO NVMe M.2 500GB

COOLER: Wraith Prism with RGB LED