Hardware
- CPU: AMD Ryzen 9 5950X 16-Core 32-Threads.
- Motherboard: Asus X570 Crosshair 7 DarkHero.
- System Memory: 128 GB DDR4 3200 CL18.
- GPUs: RTX 4080, RTX 3080, RTX 2080, GTX 1080.
- Bandwidth: PCIe Gen 4.0, x8.
- OS: Windows 11 Pro.
- GPU driver: NVIDIA Studio Driver version 536.40.
- Displays: No monitors attached to the GPUs.
How we ran the tests
We ran four scenes in Progressive mode, double-checked the results, and tuned each scene to reach 100% GPU utilization. Each test ran for a minimum of one full minute to provide comparable, repeatable results.
Results
Pascal to Turing shows average 1.6X speedup in CUDA
Turing to Ampere shows average 2.4x speedup in CUDA and 2.53x in RTX
Ampere to Ada shows average 1.87x speedup in CUDA and 1.86x in RTX
We tested the same scenes between the RTX 3090 and RTX 4090, there is 2.15x speedup in CUDA and 2.2x speedup in RTX
Test 1:
Test 2:
Test 3:
Test 4:
Note: this scene includes thousands of leaves and grass objects, and has all shading baked to textures, hence showing a big boost for RTX mode. In most cases, CUDA mode should be close to RTX mode in performance.
Performance scaling summary
You can expect V-Ray GPU to scale very well on recent NVIDIA GPU generations, often delivering nearly double the performance from one generation to the next.