The main reason is that the different graphics cards are meant for different use cases. I f you look at some of the top GPUs like Titan or Quadro cards, they might have more or less the same Octanebench Score, but the price difference is huge. Besides, the cards can be different models, allowing you to use GPUs from two completely different architectures in a machine with multiple PCI-E slots. In particular, rendering with four RTX 3090 (Octane bench: 2751.61 ) will be 4x faster than using one RTX 3090 (OctaneBench: 661 ) without the need for SLI. Moreover, it can accelerate workflows with next-gen GPUs and high-speed storage devices and support 128 PCIe lanes as well. This is the world’s only processor family supporting PCIe 4.0, which delivers twice the I/O performance over PCIe 3.0. With this in mind, we choose CPU AMD Ryzen Threadripper processor to do these tests. Please note that you need a powerful enough CPU to avoid bottlenecks. If your motherboard can accept more than one video card, adding additional video cards greatly improves OctaneRender’s rendering speed. Second, OctaneRender completely relies on the GPU for rendering performance, therefore, it’s great for analyzing our Multi-GPU scaling which should be near 100 % effective in Octane Render. First, the important thing we need to keep in mind is that Octane Render supports CUDA GPUs only and no OpenCL meaning it supports NVIDIA only.
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