This report presents worldwide PC and worldwide desktop PC market volume per year for the period 2002 - 2013 and per quarter for the period 1Q 2007 - 4Q 2009. Also included are forecasts of worldwide desktop PC market volume and share by region and by CPU connector type. This report also provides comparison of worldwide motherboard and desktop PC market volume. This research finds that the worldwide PC market volume, though projected to inch down in 2009, is forecasted to see continuous growth during the period 2010 ?2013. Meanwhile, the worldwide desktop PC market volume, though expected to take a plunge in 2009, is projected to see slight growth during the period 2010 ?2013. LGA775 is expected to remain the most common CPU connector type, followed by Socket AM2. The worldwide motherboard/desktop PC shipment volume ratio is projected to remain above the level of 13% during the period 2009 - 2013.