Does Redshift support OpenCL?

Our official minimum requirements are:

For Windows and Linux: NVIDIA GPU with CUDA compute capability 5.0 or higher and 8 GB VRAM

Our recommended requirements are:

For Windows and Linux: NVIDIA GPU with CUDA compute capability 7.0 or higher and 8 GB of VRAM or more. We recommend an NVIDIA Quadro, Titan or GeForce RTX GPU for hardware-accelerated ray tracing
For macOS: Apple M1 16 GB or AMD "Navi" or "Vega" GPU or later with 8 GB VRAM or more.