August 23, 2023 Yen Lily

Is RTX4090 a good choice for Keyshot rendering?

If you work with Keyshot, a 3D ray-tracing rendering software famous for 3D products design and jewelry rendering, you will definitely know that it supports GPU rendering for some times. The GPU solutions in Keyshot could be up to 13 times faster than CPU-based solutions on desktop, which leads to the question which GPU is the best for Keyshot rendering.

And because recently, we have RTX4090 released and become a hot topic for 3D content and render, let’s see if RTX4090 is a good choice for Keyshot rendering.

Technology overview and comparison

RTX4090, the latest GPU of Nvidia, is based on Ada Lovelace architecture, while RTX 3090 is on the last generation Ampere architecture. The new architecture will introduce to you a new generation of RT cores for real-time ray tracing, Tensor cores for machine learning acceleration, and CUDA cores for basic graphics computations.

The clock frequency is for GPU clock speed, with higher means faster processing. RTX 4090 based clock and boost clock are higher than 2 GHz (2.23 and 2.52 GHz respectively), faster than the old Ampere architecture RTX3090.

The graphics features of both GPUs are kind of the same, with RTX4090’s CUDA is 8.9, while the other are 8.6.

Render config comparison

Come to the render config, you should pay attention to three different types of processing:

        • CUDA Cores (Shading units): more CUDA cores or shading units means faster processing of different aspects of the image.
        • Tensor cores can accelerate the speed of matrix multiplication. It has more applications in machine learning or deep learning, but it also affects the creation of 4K graphics or videos.
        • RT cores is responsible for Real-time ray tracing, a technology that mimics the physical behavior of light rays, delivering a higher-quality and more photorealistic results than other technology. More RT cores means the GPU can do the math of ray-tracing quicker than the others.

RTX4090 is on the next level, when its CUDA cores are about 1.5 times higher than RTX 3090. Same result goes for Tensor cores and RT cores.

Other things you should keep an eye on are TMUs and ROPs.

        • TMUs take textures and map them to the geometry of a 3D scene. More TMUs will mostly mean that texture information is processed faster.
        • The ROPs are responsible for some of the final steps of the rendering process, writing the final pixel data to memory and carrying out other tasks such as anti-aliasing to improve the look of graphics.

RTX4090 is performing great, while its TMUs and ROPs are about 1.5 times greater than RTX 3090.

Theoretical performance comparison

The floating-point performance (TFLOPS) helps you determine the raw power of the GPU. And here, you can see a great improvement where RTX 4090 is 2.3 times higher than RTX3090.

Is RTX4090 a good choice for Keyshot rendering?

In general, we can see that RTX4090 specification is so attractive and could outperform older Ampere architecture graphics card such as RTX3090. However, is it really faster in rendering? We would look into some benchmark tests to have an answer.

Undoubtedly, RTX4090 is the fastest. TechGage team has tested on two scenes, and RTX4090 is 2 or 1.5 times faster than RTX3090.

In the first scene rendered a character, while RTX3090 takes 106 seconds to render, RTX4090 only takes half of the time and finish in 53 seconds.

The second scene is Circuit board and this time RTX4090 takes 40 second to render. It’s about 1.5 times faster than RTX3090.

RTX4090 is a phenomenally powerful GPU. Depending on your project’s render settings, the speed could vary and sometimes it could deliver a double performance. However, there are downsides existing. The new RTX4090 does not support NVLink, so it’s a big disappointment for anyone who want to go for complexity. The power needed for RTX4090 is also higher than RTX3090, while you are not sure that the speed could be 2x faster.

I still say RTX4090 is a good choice for Keyshot rendering, because of its power and high amount of CUDA cores and RT cores. But you can find a render farm for it, not necessarily buy one.

iRender - the best cloud rendering for Keyshot with RTX4090

iRender is proud to introduce our remote workstation, from single to multiple RTX4090. We provide you supercomputers, with high-end specifications like AMD Ryzen™ Threadripper™ PRO 3955WX @ 3.9 – 4.2GHz or AMD Ryzen™ Threadripper™ PRO 5975WX @ 3.6 – 4.5GHz, RAM 256GBStorage NVMe SSD 2TB. Most importantly, we always update to the latest GPU technology, with 1/2/4/6/8 x RTX3090/RTX4090.

You are free to install any 3d software or rendering engines, including Keyshot on our remote servers, add your own license then render or modify your project by yourself.

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Thank you & Happy Rendering!


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Yen Lily

Hi everyone. Being a Customer Support from iRender, I always hope to share and learn new things with 3D artists, data scientists from all over the world.


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