This report presents worldwide PC and worldwide desktop PC market volume per year for the period 2005 - 2016 and per quarter for the period 1Q 2010 - 4Q 2012. 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 report finds that the worldwide PC market volume is forecasted to see steady growth during the period 2012 - 2016. Meanwhile, the worldwide desktop PC market volume - which saw moderate growth in 2011 - is projected to witness year-on-year decrease during the period 2012 - 2013. Market demand for desktop PC is expected to grow in 2014; nevertheless, after 2015, the worldwide desktop PC market is forecasted to experience accelerating declines owing to the impact of desktop virtualization on the business sector.