CPU vs GPU rendering

CPU vs GPU rendering

If you work with product design, architecture, graphic design, animation or general media content you have probably created several renders – or CGIs (Computer Generated Images). In 2021 there is an increasing demand for high quality renders. Some want to showcase their upcoming project in an early stage and needs 3D renders to properly represent their product or building. Others want to gain more exposure through social media and banners for their business. Due to the pandemic, use of IT is significantly increased, and more businesses are established than ever.

In this article we will examine the two main categories in 3D rendering – CPU rendering and GPU rendering. We will use average hardware and software to see the difference in time spent and quality achieved. Lastly, we will show how our product - BlackBeast Pro - can benefit your rendering.

Technical differences between the CPU and GPU

The CPU or Central Processing Unit acts as the center of the system. It’s responsible for running all the programs on your computer. Average cores of a CPU in a computer range from 4-12.

The GPU or Graphics Processing Unit is utilized for graphics-related tasks and work. In the past they have been specialized for graphics processing only, but with the rapid evolution in recent years the graphic cards have evolved into advanced mini-computers on their own.

Graphic cards have a lot more cores than a CPU, but run at a slower speed. As an example, Nvidia RTX 3090 graphic card has a total of 10,496 cores running at 1.7Ghz, while Intel's i9 CPU has 8 cores running at 2.3Ghz.

Benchmark

The render engine we will use for this example is AMD ProRender which is a powerful render engine with with Cinema 4D preinstalled. With ProRender you can utilize both CPU rendering and the GPU rendering. Resolution are set to 4K with high quality rendering.

The hardware utilized was a MacBook Pro 15” with an Intel 8 core i9 2,3GHz. The render was completed in 2 hours, 23 minutes and 35 seconds. The issue we encountered was heating throttling after a little while, which resulted in slower rendering in total. In addition, we experienced several computer freezes, slowing down our work significantly. We could not use the computer while it was rendering.

We then connected our product, BlackBeast Pro, enabling us to take advantage of the graphic card installed, a Nvidia RTX 3090. With the same settings the render was completed in just 1 minute and 52 seconds. The thermals of the graphic card were controlled thanks to the automatic fan control system. In addition, we could still use the computer while rendering since the rendering was outsourced to BlackBeast Pro.

Conclusion

There is no doubt that the GPU rendering is the faster choice. It’s 77x(!) times faster than traditional CPU rendering. Zooming the image to 200% and comparing results of the rendering performed by the GPU and CPU proves identical quality.

In 2021 there is high demand for quality rendering to clients. With BlackBeast Pro you do not only gain much faster rendering, but you can also work on multiple projects simultaneously since BlackBeast Pro is taking over the heavy lifting.

In short: Much faster rendering to desired quality, significant reduction in lost time due to elimination of computer freezes, and continuous use of your computer as heavy lifting is outsourced to the BlackBeast Pro.

If you find BlackBeast Pro interesting, feel free to check out our website.