When comparing across generations, you'll get the most accurate picture if you stick with the same kind of chip (eg. desktop-class GPUs) and same vendor so that they're more likely to count transistors the same way from one year to the next.
When comparing across generations, you'll get the most accurate picture if you stick with the same kind of chip (eg. desktop-class GPUs) and same vendor so that they're more likely to count transistors the same way from one year to the next.