I know. But AMD was locked at the 40 nm process at that time.
Barts was 1120 shaders.
Turks was 480 shaders.
They needed something inbetween. Instead of redesigning a new 800 shader asic at 40 nm, they reused their current chip. Redesigning new chips at the same shader numbers would waste millions of dollars.


This time it's different, they are no longer locked at 40 nm, and you know that.