Iray cuda vs Luxrender opencl

patboudrum

Hello everybody,

I would like to know if someone had the chance to compare render times between Iray Cuda with a Nvidia gpu and Luxrender opencl with an AMD gpu?

With Iray to use the gpu for rendering you need cuda. But Luxrender use opencl to render with the gpu.  We should see some benefit to use an AMD gpu with luxrender.

Anyone did the test?!?!

Thank you!

XoechZ

Well, I had an AMD R9 270x and used it with Reality 4.2 in OpenCL mode.

Now I have a Nvidia GTX 970 and use Iray.

Render speeds are the same. I cannot say which one was faster. It always depends on the scene, the lights and the materials.

The only benefit with Reality OpenCL was that the CPU and GPU always worked together, no matter how much RAM your scene used. You did not have to care about that. With Iray, if your scene is too big for your GPU (VRAM) it renders in CPU mode and that is much slower.