Not much. The gpu syntax basically saves you from having to figure out the right devices on a multi-GPU system, it also can do slightly more than just card+render, especially on NVIDIA where it picks up a bunch of other related devices.
Not much. The gpu syntax basically saves you from having to figure out the right devices on a multi-GPU system, it also can do slightly more than just card+render, especially on NVIDIA where it picks up a bunch of other related devices.