According to figures from Current Analysis, Intel lost a lot of marketshare to AMD in the fourth quarter of 2005:
Intel's share of the U.S. retail PC market fell by 11 percentage points, from 64.4 percent in the fourth quarter of 2004 to 53.3 percent, said Sam Bhavnani, a senior analyst at Current Analysis. Current Analysis' market share numbers measure U.S. retail sales only, and therefore exclude figures from Dell, which uses its Web site to sell directly to consumers. Dell, the top PC vendor in the U.S., exclusively uses Intel's processors in its PCs. (Sales by online retailers were excluded from the market share analysis as well).
Sales of Intel-based desktop PCs fell 22.3 percent during the fourth quarter, according to Current Analysis. As a result, sales of AMD-based desktops took the lead during the pivotal fourth-quarter holiday shopping season. AMD chips were found in 52.5 percent of desktop PCs sold in U.S. retail stores during that period.