Intel did made some GPUs in early times, but never be main stream, most for e poor onboard chip for low-cost PC or NoteBook.
Poor old Intel, I wonder how they even stay alive... ;P
graphics shipments and supplier market share for the first calendar quarter of 2006
Overall, Intel claimed 34.1% of the desktop graphics market, ATI held 26.1%, and Nvidia followed with 23.3% market share.
Intel led the mobile graphics market with 53.3% share, ATI held 36.4% share, and Nvidia followed with 6.6% market share.
Intel saw a 1.8% sequential decline in graphics shipments in Q1 2006, was the largest supplier of PC graphics devices worldwide, and claimed an increased share of the total graphics market during the quarter.
http://www.electronicstalk.com/news/jop/jop101.html