Previously, most ODMs enjoyed an over 20% sequential growth in notebook shipments in the third quarter, the sources noted.
Quanta Computer shipped about five million notebooks each in August and September, indicating that the company's shipment momentum for notebooks has disappeared, said the sources.
Compal Electronics shipped 3.4 million notebooks in September, up only 6.3% from the previous month.
However, shipments of Apple's MacBook Air and iMac lineups from ODMs have been strong recently, likely to exceed two million units a month during the September-November period, the sources indicated.