> a single-chip processor with integrated transform, lighting, triangle setup/clipping, and rendering engines that is capable of processing a minimum of 10 million polygons per second
It’s kind of arbitrary, even when you take out the processing rate. But prior to that there was still a significant amount of work expected to be done on the CPU before feeding the GPU.
That said, the term GPU did definitely exist before NVIDIA, though not meaning the same thing we use it for today.