GPGPU technology has stimulated the appearance of several renderings on the GPU in the market, including iRay, V-ray RT, Octane, and Arion. But open-source community made available at least two free renders on the GPU: SmallLuxGPU and Cycles Render. I want to share my impressions about the second one.
Cycles Render is unbiased render with the ability to render on the GPU (CUDA and OpenCL for ATI). It lies in a box with the Blender that runs on Windows, Linux, and OSX.
Cycles Render, this is a car with the procedural texture, FullHD was prepared in 2 minutes using GTX580.