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.
- Nvidia Studio drivers 536.40.
- No monitors attached to the GPU(s).
Testing
We have tested 4 scenes on this hardware using Progressive mode, the results are double checked. The scene are setup carefully to push the GPUs to 100% usage, to ensure accurate results. All tests run for at least one full minute
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Pascal to Turing shows average 1.6X speedup in CUDA
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Turing to Ampere shows average 2.4x speedup in CUDA and 2.53x in RTX
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Ampere to Ada shows average 1.87x speedup in CUDA and 1.86x in RTX
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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.
Conclusion
V-Ray GPU shows very good performance scaling on the latest NVidia GPU generations, nearly doubling the performance every generation.