I wrote an OpenCL program to convert Laititude-Longitidue to UTM coordinates. I am using an Nvidia gtx285 with 190.89 driver and CUDA 2.3. When I use ‘#pragma OPENCL EXTERNSION cl_khr_fp64 : enable’ I get an unsupported extension error which basically tells me OpenCL doesn’t know how to deal with doubles. Does anyone know if I need an updated driver or does current Nvidia drivers not support double precision in OpenCL? Thanks.