The launch of AMD's HD 4800-series has boosted the company's discrete graphics card market share from 30% to 40%, and another 10% gain is expected this year.

With AMD officially announcing its ATI Radeon HD 4870 X2 GPU, the company has noted that its ATI Radeon HD 4800-series has boosted the company's discrete graphics card market share from 30% to 40%, and it expects to achieve a 50% market share by the end of 2008, and will surpass Nvidia in 2009.

AMD also noted that it expects its discrete graphics card to IGP ratio in notebook shipments will be 35:65 in 2009.

Nvidia rebuked AMD's comments saying it has the performance lead with its GeForce 200-series graphics products, while AMD claimed its Radeon HD 4800-series were clearly the more advanced.