OpenCL seemed to have comparable performance to CUDA when we stopped using CUDA. I don't have comparisons with RTX on hand. The main problem with OpenCL now is

OpenCL seemed to have comparable performance to CUDA when we stopped using CUDA. I don't have comparisons with RTX on hand. The main problem with OpenCL now is not performance but vendor/driver support. For example the Apple OpenCL drivers are pretty buggy.