Unlike consumer PCs where AMD dominates in the notebook segment, Nvidia dominates in professional graphics segment both in desktops and notebooks.

FORBES: Desktop Chip Slippage Doesn't Doom Nvidia

Graphics segment revenue decreased seven percent sequentially and 15 percent year-over-year.

ENGADGET: AMD reports $1.27 billion in revenue for Q3 2012

The Display and Graphics segment produced 13.5% of sales.

FORBES: Post-Its Still Yield In Digital Age