ATI lost market share across the board in Q3
 

According to new numbers from Jon Peddie Research, the market wasn't kind to ATI in the third quarter of this year. While PC graphics shipments increased 5.2% from the second quarter overall, ATI's market share shrunk about 5%. The biggest drop for the red team was in the mobile segment, where its market share went down from 31% to 24%, while Nvidia's share jumped from 10.9% to 19%. The discrete graphics processor market was especially unkind, seeing ATI's market share sink from 63% to 47%.

http://www.techreport.com/onearticle.x/11385