FRAMINGHAM, MA – First-quarter worldwide PC microprocessor shipments were up 7.4% year-over-year and 1.6% sequentially, says IDC.

IDC expects full-year 2011 shipments to rise 10.3% compared to 2010. 2011 revenue is expected to grow 17.6% to nearly $43 billion.

In the first quarter, Intel had 80.8% unit market share, while AMD had 18.9%, both flat sequentially.

Demand for the second half of 2011 looks good, the firm says. Japan’s “earthquake and tsunami had minor effects on the PC supply chain," said IDC’s Shane Rau. "However, the real near-to-mid term concern there is the effect on Japanese demand for PCs and so microprocessors."

By 2015, IDC expects that more than 13% of PC processors will be based on ARM architecture.

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